Best Water Softener for San Antonio, TX — 17 Things to Know BEFORE You Buy!

Written by Craig "The Water Guy" Phillips

1. The Local Water Problem in San Antonio, TX

Walk into any San Antonio hardware store and ask about water heaters — the first question isn't about brand or size, it's about how often you're willing to replace heating elements. That's because San Antonio's water delivers a punishing 13.5 grains per gallon (GPG) of dissolved calcium and magnesium, placing it firmly in the "extremely hard" category that affects fewer than 15% of American cities.

To understand what 13.5 GPG means for your home, picture calcium and magnesium as microscopic construction workers that never take a day off. Every gallon of San Antonio water contains enough dissolved minerals to leave behind 13.5 grains of scale — roughly equivalent to a pinch of salt. In a typical household using 300 gallons daily, that translates to over 4,000 grains of mineral buildup entering your plumbing system each day.

San Antonio draws its water primarily from the Edwards Aquifer, a massive underground limestone formation that stretches across South Central Texas. As groundwater flows through this limestone bedrock for decades or centuries, it dissolves enormous quantities of calcium carbonate — the same mineral that forms stalactites in caves. The result is some of the most mineral-rich municipal water in Texas, with hardness levels that would be considered moderate in cities like Phoenix or Las Vegas but represent a significant infrastructure challenge for San Antonio homeowners.

The financial reality hits San Antonio residents in three waves: shortened appliance lifespans, dramatically increased soap and detergent consumption, and energy efficiency losses that compound month after month. At 13.5 GPG, scale formation isn't a gradual process — it's aggressive, immediate, and expensive. Water heaters lose measurable efficiency within months, not years. Tankless units frequently void their warranties without proper water treatment. The "hard water tax" for an average San Antonio household approaches $1,200 annually when you factor in premature appliance replacement, excess detergent costs, and energy losses.

2. What 13.5 GPG Does to Your Home

At 13.5 GPG, calcium carbonate doesn't just coat your water heater's heating elements — it forms geological layers that can reduce efficiency by 25-35% within the first 18 months. The process begins immediately when San Antonio water is heated above 140°F. Calcium and magnesium ions, which remain dissolved at room temperature, precipitate out as solid crystals when heated. These crystals bond to metal surfaces in concentric rings, creating an insulating barrier between the heating element and the water it's supposed to warm.

The chemistry is relentless: every degree above 140°F accelerates the precipitation process exponentially. A 40-gallon electric water heater in San Antonio, operating without a water softener, will typically accumulate 3-4 inches of scale at the bottom of the tank within two years. This isn't just inefficiency — it's structural damage. The heating elements work harder to penetrate the mineral barrier, leading to premature burnout and replacement costs that can exceed $400 annually.

San Antonio's older neighborhoods, particularly those with galvanized steel pipes installed before 1980, face an accelerated timeline for plumbing degradation. At 13.5 GPG, calcium deposits form faster on the rough interior surfaces of galvanized pipes compared to newer copper or PEX systems. The mineral buildup creates a cascading effect: as pipe diameter narrows, water velocity increases, which paradoxically accelerates further scale formation in downstream fixtures and appliances.

Appliance manufacturers have documented these effects extensively. Dishwashers operating with 13.5 GPG water experience spray arm clogging within 6-12 months, compared to 3-5 years in soft water areas. Washing machines develop mineral buildup in pump housings and valve assemblies that leads to premature failure — typically 4-6 years instead of the expected 10-12 year lifespan. Coffee makers, ice makers, and steam appliances fail even faster, often requiring replacement within 2-3 years.

The soap and detergent impact is both immediate and ongoing. At 13.5 GPG, calcium and magnesium ions chemically react with soap to form insoluble precipitates — the grey scum you see in bathtubs and the film that makes dishes look cloudy. This chemical reaction means soap literally cannot perform its cleaning function until all the hardness minerals are neutralized. San Antonio households typically use 3-4 times more laundry detergent, dish soap, and shampoo compared to families in soft water cities, adding $300-500 annually to grocery bills.

The skin and hair effects become noticeable within weeks of moving to San Antonio from a soft water area. Calcium ions strip natural oils from skin and create a mineral film that blocks moisturizer absorption. Hair becomes coarse and difficult to manage as minerals coat each strand. Residents with sensitive skin or eczema report significant worsening of symptoms, particularly during San Antonio's hot summer months when shower frequency increases.

Perhaps most frustrating for San Antonio homeowners is the irreversible damage to surfaces and fabrics. White water spots on glass surfaces aren't just cosmetic — they're permanent etching caused by calcium carbonate crystallization. Dishwasher interiors develop a chalky white coating that cannot be cleaned away with conventional detergents. Clothing becomes grey, stiff, and scratchy as mineral deposits build up in fabric fibers with each wash cycle.

When you calculate the total annual "hard water tax" for a San Antonio household — combining energy losses ($180-240), excess soap costs ($350-450), and accelerated appliance depreciation ($400-600) — the financial impact approaches $1,000-1,300 per year. Over a typical 15-year homeownership period, that's $15,000-20,000 in preventable costs.

3. San Antonio's Specific Contaminant Profile

Beyond the 13.5 GPG hardness baseline, San Antonio residents are also contending with chlorine, sediment, iron, and fluoride — each of which interacts with water hardness in its own way. The San Antonio Water System (SAWS) manages one of the most complex water treatment challenges in Texas, balancing Edwards Aquifer chemistry with federal drinking water standards across a service area exceeding one million residents.

Chlorine in San Antonio Water

SAWS adds chlorine as the primary disinfectant to eliminate bacteria and viruses during water treatment and distribution. Chlorine levels typically range from 1.0-4.0 mg/L throughout the San Antonio distribution system, with higher concentrations during summer months when bacterial growth risk increases. The interaction between chlorine and San Antonio's 13.5 GPG hardness creates a compounding problem: chlorine degrades rubber gaskets and seals in appliances, while calcium scale provides surface area for chlorine to concentrate and cause accelerated corrosion.

San Antonio residents often notice a stronger chlorine taste and odor during July and August when SAWS increases disinfection levels to combat higher bacterial loads in the distribution system. The chlorine also forms disinfection byproducts (trihalomethanes and haloacetic acids) when it reacts with organic matter in the Edwards Aquifer water. While these byproduct levels remain well below EPA maximum contaminant levels, many residents prefer to remove chlorine for taste and odor improvement.

A standard water softener like the SoftPro Elite HE does not remove chlorine — this requires a separate activated carbon filter system. For San Antonio households wanting both soft water and chlorine removal, a whole-house carbon filter installed upstream of the softener provides comprehensive treatment.

Sediment and Turbidity

San Antonio's water distribution system includes over 4,000 miles of underground pipes, some dating to the 1940s. Sediment enters the water through pipe corrosion, main line breaks, and periodic system maintenance. The sediment appears as brown or rust-colored particles, particularly noticeable after heavy rains when system pressure fluctuations can dislodge accumulated deposits.

At 13.5 GPG hardness, sediment particles provide nucleation sites where calcium and magnesium can crystallize more rapidly. This creates a synergistic effect where both sediment and scale buildup accelerate beyond what either would cause independently. The combination clogs aerators, showerheads, and appliance screens faster than hardness alone.

The SoftPro Elite HE includes a self-cleaning sediment pre-filter specifically designed to capture particulate matter before it reaches the softening resin. This feature is particularly valuable in San Antonio, where protecting the resin from sediment damage extends system life and maintains performance at this high hardness level.

Iron Content

Edwards Aquifer water naturally contains dissolved iron, typically ranging from 0.1-0.3 mg/L in the San Antonio system. This is ferrous iron — invisible and tasteless when the water leaves the treatment plant, but it oxidizes to ferric iron when exposed to air or chlorine. The oxidized iron appears as red or orange staining on fixtures, laundry, and dishware.

The combination of iron and 13.5 GPG hardness creates particularly stubborn stains that are nearly impossible to remove from porcelain and ceramic surfaces. Iron bonds chemically with calcium deposits, forming compound stains that penetrate surface materials. These stains are most noticeable on white fixtures, toilet bowls, and in dishwasher interiors.

While the SoftPro Elite HE can handle low levels of iron (under 0.3 mg/L), iron concentrations above this threshold will gradually foul the softening resin, reducing its effectiveness and lifespan. San Antonio homeowners with visible iron staining should test their water and consider an iron-specific pre-filter upstream of the softener to protect the resin investment.

Fluoride Addition

SAWS adds fluoride to San Antonio water at approximately 0.7 mg/L, following CDC recommendations for dental health. This level is well below the EPA maximum contaminant level of 4.0 mg/L and the secondary standard of 2.0 mg/L for aesthetic effects. The fluoride addition is carefully monitored and remains consistent throughout the distribution system.

Water softeners do not remove fluoride — the ion exchange process specifically targets calcium and magnesium ions while leaving fluoride unchanged. San Antonio residents who wish to remove fluoride from their drinking water need a separate reverse osmosis system at the kitchen tap. The softener and RO system work complementarily: the softener protects the RO membrane from scale damage while the RO system addresses fluoride and other dissolved contaminants.

4. Why Most San Antonio Homeowners Pick the Wrong Softener

Walk through any big-box store in San Antonio and you'll find water softeners marketed as "one-size-fits-all" solutions — a dangerous assumption when dealing with 13.5 GPG water that can overwhelm an undersized system within days. After reviewing hundreds of warranty claims and talking with local plumbers, four mistakes consistently emerge as the primary reasons San Antonio softener installations fail to deliver expected results.

The first and most costly mistake is buying based on price alone rather than grain capacity requirements. A 24,000-grain softener that performs adequately in Austin (7-8 GPG) or Dallas (6-7 GPG) will be completely overwhelmed by San Antonio's 13.5 GPG demand. The resin bed exhausts in 2-3 days instead of the expected week, forcing constant regeneration cycles that waste salt and water while still allowing hard water breakthrough during peak usage periods.

The second mistake involves confusing water softeners with water filters — a misunderstanding that leaves San Antonio residents frustrated when their new softener doesn't address chlorine taste or iron staining. Softeners use ion exchange resin to remove calcium and magnesium specifically. They do not reliably remove chlorine, sediment, iron (above trace levels), or fluoride. San Antonio households dealing with both 13.5 GPG hardness and multiple contaminants need a properly sequenced treatment approach: sediment pre-filtration, then softening, then activated carbon for chlorine removal if desired.

The third critical error is ignoring the grain capacity mathematics entirely. The formula is straightforward: household members × 75 gallons per person per day × 13.5 GPG = daily grain removal demand. For a typical 4-person San Antonio household, that's 4 × 75 × 13.5 = 4,050 grains daily, or 28,350 grains weekly. Add a 20% buffer for high-usage days and you need at least 34,000 grains of capacity — ruling out most entry-level systems entirely.

The fourth mistake is overlooking salt efficiency ratings, which becomes exponentially more important at San Antonio's hardness level. An inefficient softener operating at 13.5 GPG will use 15-20 pounds of salt per regeneration cycle, compared to 6-8 pounds for a high-efficiency model. Over 10 years, this difference compounds to 3,000-4,000 pounds of additional salt — roughly $600-800 in extra costs, plus the environmental impact of increased sodium discharge.

5. The SoftPro Elite HE: Built for San Antonio's Water

After evaluating San Antonio's water hardness of 13.5 GPG and the presence of chlorine, sediment, iron, and fluoride in the local supply, one system consistently rises to the top for San Antonio homeowners: the SoftPro Elite HE Water Softener. This isn't marketing convenience — it's engineering reality. The Elite HE was specifically designed to handle the extreme hardness levels and complex water chemistry found in cities like San Antonio, where lesser systems fail within months.

The foundation of the SoftPro Elite HE's San Antonio performance lies in its true salt-based ion exchange technology. Salt-free "conditioners" marketed as alternatives do not actually remove hardness minerals — they attempt to change calcium crystal structure to reduce scale formation. At 13.5 GPG, this approach fails completely because the mineral concentration overwhelms any conditioning effect. The SoftPro uses high-capacity cation exchange resin to physically replace every calcium and magnesium ion with sodium, delivering genuinely soft water that tests under 1 GPG consistently.

The demand-initiated regeneration (DIR) system becomes operationally essential at San Antonio's hardness level, not just a convenience feature. At 13.5 GPG, resin beds exhaust much faster than in moderate hardness cities — often in 5-6 days instead of 2-3 weeks. DIR monitors actual water usage and resin capacity continuously, regenerating only when the resin is truly depleted. This prevents the hard water breakthrough that occurs when regeneration is delayed, while also avoiding the salt and water waste of premature regeneration cycles.

The NSF/ANSI Standard 44 certification provides critical assurance for San Antonio residents already managing multiple water contaminants. This certification verifies that the resin meets strict performance and materials safety standards — confirming that the softening process itself doesn't introduce additional contaminants into water that already contains chlorine, iron, and fluoride. For families concerned about water quality, knowing the treatment system is certified provides essential peace of mind.

Grain capacity options ranging from 32,000 to 80,000 grains allow precise sizing for San Antonio households without over-purchasing or under-sizing. Using the capacity formula for a 4-person household: 4 people × 75 gallons × 13.5 GPG × 7 days = 28,350 grains weekly, plus 20% buffer = 34,020 grains needed. This clearly indicates the 48,000-grain model as optimal, providing adequate capacity without excessive salt consumption or footprint.

The 10-year comprehensive warranty addresses the reality that San Antonio's 13.5 GPG places extraordinary stress on water treatment equipment. While softeners in moderate hardness cities might last 15-20 years, the aggressive mineral content in San Antonio water creates accelerated wear on all components. A decade of warranty coverage protects homeowners during the highest-stress operational period and reflects the manufacturer's confidence in the system's durability under extreme hardness conditions.

The SoftPro Elite HE's compatibility with upstream iron and sediment pre-filtration directly addresses San Antonio's multi-contaminant challenge. The system is engineered to work downstream of iron removal media or sediment filters without voiding warranty coverage. This allows San Antonio homeowners to build a comprehensive treatment train: sediment pre-filter → iron filter (if needed) → SoftPro Elite HE → activated carbon post-filter (for chlorine) — addressing every contaminant in the local water supply systematically.

The self-cleaning sediment pre-filter integrated into the Elite HE design captures particulate matter before it reaches the softening resin, protecting the resin investment in a city where both sediment and extreme hardness are present simultaneously. This feature extends resin life and maintains consistent performance in San Antonio's challenging water environment.

For San Antonio households dealing with 13.5 GPG of water hardness and the compounding presence of chlorine, sediment, iron, and fluoride, the SoftPro Elite HE is not a comfort upgrade — it is infrastructure protection for your home.

6. How to Size Your Softener for San Antonio

Proper sizing for San Antonio's 13.5 GPG water requires precise mathematics — guessing or using manufacturer "rules of thumb" designed for moderate hardness will result in system failure. The sizing process involves six calculated steps that account for both daily usage patterns and the extreme mineral load in local water.

Step 1: Count all household members, including children and any regular long-term guests. For this example, we'll calculate for a typical 4-person San Antonio household.

Step 2: Multiply by 75 gallons per person per day, which accounts for all water uses including showers, laundry, dishwashing, and cooking. San Antonio households may use slightly more during summer months due to increased shower frequency, but 75 gallons per person provides an accurate annual average. 4 people × 75 gallons = 300 gallons daily.

Step 3: Multiply household water usage by San Antonio's exact hardness level of 13.5 GPG to determine daily grain removal demand. 300 gallons × 13.5 GPG = 4,050 grains of hardness minerals that must be removed daily.

Step 4: Multiply daily grain demand by 7 to calculate weekly capacity requirements. 4,050 grains × 7 days = 28,350 grains weekly. This represents the minimum resin capacity needed for once-weekly regeneration.

Step 5: Add a 20% buffer for high-usage days such as weekends with guests, extra laundry loads, or lawn watering that flows through the house system. 28,350 × 1.20 = 34,020 grains total weekly demand.

Step 6: Match the calculated demand to SoftPro Elite HE grain capacity tiers. The 32,000-grain model falls short of the 34,020-grain requirement. The 48,000-grain model provides adequate capacity with room for usage variations. The 64,000-grain model offers extended capacity for larger families or homes with high water usage, while the 80,000-grain model is typically reserved for very large households or small commercial applications.

For optimal salt efficiency and resin longevity, target regeneration every 5-7 days. More frequent regeneration wastes salt and water; less frequent regeneration risks hard water breakthrough during peak demand periods. The 48,000-grain SoftPro Elite HE, properly sized for San Antonio's 4-person household, will regenerate approximately every 6 days under normal usage patterns.

7. Installation in San Antonio: What to Know

San Antonio does not require a licensed plumber for residential water softener installation, but the city's high mineral content makes proper installation critical for system longevity and performance. Many homeowners can complete the installation as a weekend project, though professional installation ensures warranty compliance and optimal system setup.

The SoftPro Elite HE must be installed after the main water shutoff valve but before the water heater to protect all downstream plumbing and appliances. In San Antonio's typical slab-foundation homes, this usually means installation in the garage near the water heater location. The system requires 110V electrical connection for the control valve and adequate clearance for salt loading and maintenance access.

Drain line installation is mandatory for regeneration discharge — the system must purge hardness minerals and excess salt during each regeneration cycle. San Antonio municipal code allows softener discharge to flow to the sanitary sewer system, laundry sink, or properly sized floor drain. The drain line cannot terminate outside or connect to storm drains due to environmental regulations regarding sodium discharge.

San Antonio's municipal water pressure typically ranges from 45-65 PSI throughout most residential areas, which falls within the SoftPro Elite HE's optimal operating range of 25-80 PSI. However, homes in older neighborhoods or at higher elevations may experience lower pressure that could affect regeneration performance. A pressure test during installation confirms adequate flow rates for both service and regeneration modes.

Salt selection becomes critical at San Antonio's 13.5 GPG hardness level. Evaporated salt pellets provide the highest purity and lowest insoluble residue, reducing brine tank maintenance and ensuring consistent regeneration performance. Solar crystals, while less expensive, contain higher levels of impurities that can accumulate in the brine tank over time, requiring more frequent cleaning at this hardness level.

Salt level monitoring requires attention every 3-4 weeks in San Antonio due to the frequent regeneration cycles demanded by 13.5 GPG water. The brine tank should maintain salt levels covering the water line but not exceed two-thirds full to allow proper brine mixing during regeneration.

8. Maintenance Schedule for San Antonio Homeowners

San Antonio's 13.5 GPG water demands a more aggressive maintenance schedule than moderate hardness cities — the extreme mineral load accelerates wear on all system components and requires proactive attention to maintain peak performance. This maintenance calendar is calibrated specifically to the local water conditions and usage patterns typical in San Antonio households.

Monthly maintenance focuses on salt management and basic system monitoring. Check salt levels every 3-4 weeks, as consumption is high at 13.5 GPG — typically 15-20 pounds per regeneration cycle compared to 6-8 pounds in soft water areas. Inspect for salt bridges, which form when humidity causes salt to crust above the water line, blocking proper brine formation. San Antonio's climate increases salt bridging risk during humid summer months. Verify the bypass valve remains in the service position and hasn't been accidentally switched during maintenance or repairs.

Every three months, perform brine tank cleaning to remove accumulated sediment and salt residue that builds up faster in high-hardness environments. Test post-softener water hardness using test strips to confirm output remains under 1 GPG — any reading above 2 GPG indicates resin exhaustion, improper regeneration, or system malfunction. Clean the sediment pre-filter if your water contains visible particulate, as the combination of sediment and 13.5 GPG hardness can clog the filter more rapidly than either contaminant alone.

Annual maintenance addresses resin performance and system optimization. Conduct a complete brine tank cleaning, removing all salt and scrubbing interior surfaces to eliminate bacterial growth and mineral accumulation. Perform a comprehensive resin bed performance evaluation — if post-softener hardness consistently measures above 1 GPG despite proper salt levels and regeneration timing, the resin may require cleaning or replacement. In San Antonio's high-iron areas, inspect resin for orange discoloration indicating iron fouling, and use iron-specific resin cleaner if needed.

Every five years, evaluate resin replacement needs based on output water quality and regeneration efficiency. At 13.5 GPG, resin degrades faster than in moderate hardness cities due to the constant high-volume ion exchange demand. Signs of resin failure include increasing hardness breakthrough, longer regeneration cycles, and higher salt consumption. Professional resin testing can determine remaining capacity and help plan replacement timing.

San Antonio residents should establish baseline water hardness measurements before installation and retest 30 days after startup to confirm the system is performing correctly. Keep a maintenance log documenting salt usage, regeneration frequency, and any water quality changes to identify potential issues before they cause system failure.

9. Is San Antonio's water at 13.5 GPG dangerous to drink?

San Antonio's 13.5 GPG hardness level is not dangerous to drink and actually provides beneficial calcium and magnesium minerals that support bone and cardiovascular health. The EPA does not regulate water hardness as a health concern — it's classified as an aesthetic and infrastructure issue rather than a safety problem. Many San Antonio residents have consumed this hard water for decades without adverse health effects.

10. Will a water softener remove chlorine from San Antonio water?

No, the SoftPro Elite HE water softener does not remove chlorine from San Antonio's water supply. Softeners use ion exchange resin specifically designed to remove calcium and magnesium ions while leaving chlorine unchanged. San Antonio residents wanting both soft water and chlorine removal need a separate activated carbon whole-house filter installed upstream or downstream of the softener system.

11. How much salt will I use per month in San Antonio at 13.5 GPG?

A properly sized SoftPro Elite HE serving a 4-person San Antonio household will consume approximately 60-80 pounds of salt monthly due to the frequent regeneration cycles required by 13.5 GPG water. This translates to roughly $15-20 monthly salt costs, significantly higher than the 20-30 pounds monthly typical in moderate hardness cities. High-efficiency regeneration technology minimizes this consumption compared to older softener designs.

12. Does San Antonio require a permit to install a water softener?

San Antonio does not require permits for residential water softener installation when installed by homeowners or contractors as an add-on to existing plumbing. However, if the installation involves new electrical circuits or significant plumbing modifications, standard electrical and plumbing permits may be required. The system must discharge to approved drainage per city code — not to storm drains or landscaped areas.

13. Why does soft water feel slippery in the shower?

Soft water feels slippery because soap can finally perform its intended function without interference from calcium and magnesium ions. In San Antonio's 13.5 GPG hard water, minerals react with soap to form insoluble scum rather than lather. After softener installation, soap creates proper lather and rinses cleanly from skin, eliminating the mineral film that previously made skin feel "squeaky clean" — which was actually mineral residue, not cleanliness.

14. How quickly will I see results after installing a softener in San Antonio?

San Antonio homeowners typically notice immediate improvements in soap lathering and reduced water spotting within 24-48 hours of installation. Skin and hair improvements develop over 1-2 weeks as existing mineral buildup washes away. Appliance protection begins immediately, but reversing existing scale damage in water heaters and pipes can take 3-6 months of consistent soft water exposure at San Antonio's hardness level.

15. Can the SoftPro Elite HE handle San Antonio's water without a separate filter?

The SoftPro Elite HE effectively handles San Antonio's 13.5 GPG hardness and low-level iron without additional filtration. However, chlorine removal requires a separate activated carbon filter, and homes with visible sediment or iron staining above 0.3 mg/L benefit from upstream pre-filtration to protect the resin investment. The integrated sediment pre-filter handles typical particulate loads in San Antonio water.

16. What happens if I run out of salt during San Antonio's summer months?

Running out of salt during San Antonio's high-usage summer period means the softener cannot regenerate properly, allowing 13.5 GPG hard water to flow through your home within 2-3 days. Scale formation resumes immediately in water heaters and appliances, and soap effectiveness disappears. Refilling salt and running a manual regeneration cycle restores soft water within hours, but even brief hard water exposure can undo weeks of scale prevention in San Antonio's extreme hardness conditions.

17. Final Verdict for San Antonio

San Antonio's water hardness of 13.5 GPG demands commercial-grade treatment capability in a residential package — and the SoftPro Elite HE delivers exactly that performance standard. The combination of chlorine, sediment, iron, and fluoride compounds the hardness challenge in specific ways that eliminate most competing systems from consideration.

The SoftPro Elite HE succeeds in San Antonio because its demand-initiated regeneration prevents hard water breakthrough during peak usage periods, its NSF-certified resin handles extreme mineral loads without fouling, and its integrated pre-filtration protects the system from sediment damage that would otherwise shorten resin life. These aren't convenience features — they're operational necessities in San Antonio's water environment.

For San Antonio households currently spending $1,000+ annually on the hidden costs of hard water — premature appliance replacement, excess detergent, energy losses — the SoftPro Elite HE represents infrastructure protection rather than luxury. Check current SoftPro Elite HE pricing and available grain capacities for a San Antonio household, and consider the 10-year warranty as essential protection during the period of highest mineral stress.

From the River Walk downtown to the Hill Country suburbs, San Antonio homeowners deserve water treatment that matches the intensity of their local water chemistry — and only systems engineered for extreme hardness deliver that protection consistently.