🔻

Low pH Pool Water

Acidic water that stings eyes and damages equipment

3,700
Monthly Searches
Corrosive
Equipment Damage
Easy Fix
Add Soda Ash
$5-20
DIY Cost

Quick Answer

Low pH (below 7.2) makes water acidic, causing eye irritation and equipment corrosion. Raise pH by adding soda ash (sodium carbonate) for quick results, or sodium bicarbonate if alkalinity is also low. Pre-dissolve chemicals and add gradually. Target pH: 7.2-7.6.

Understanding Low pH Problems

Signs of Low pH

  • Burning eyes and skin: Immediate discomfort when swimming
  • Metallic taste: Water tastes acidic or sharp
  • Equipment corrosion: Metal parts showing rust or pitting
  • Plaster etching: Rough, pitted pool surfaces
  • Vinyl liner wrinkles: Acidic water affects liner
  • Green hair/nails: Copper leaching from equipment

Damage from Low pH

  • Heater damage: Heat exchanger corrosion ($500-2000 repair)
  • Metal fittings: Ladder and rail deterioration
  • Pump components: Impeller and housing corrosion
  • Plaster surface: Permanent etching and roughness
  • Filter grids: DE filter element damage
  • Light fixtures: Housing and lens degradation

Equipment Alert: Low pH is the #1 cause of expensive pool equipment damage. A pH of 6.5 is 10x more acidic than 7.5 and can cause thousands in damage within weeks.

pH Scale & Target Ranges

pH Scale: 6.0 ← Acidic | Neutral → Basic 8.0
6.0-6.8
Too Low - Corrosive
6.8-7.2
Low - Needs Adjustment
7.2-7.6
Ideal Range
7.6-8.0
High - Reduce Chlorine Effectiveness

Most Common Causes of Low pH

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Rain Water (Most Common in Mid-Cities West of DFW Airport)

Texas thunderstorms dump large amounts of slightly acidic rainwater into pools.

Southlake, Westlake, Grapevine Area Impact: Heavy spring/summer storms can drop pH from 7.4 to 6.8 overnight. Pools without covers are most affected.

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Chemical Over-Correction

Adding too much muriatic acid when trying to lower high pH.

Prevention: Add acid gradually in small doses. Test frequently. Better to under-dose and add more than over-correct.

🍃

Organic Contamination

Decomposing leaves, algae, and other organic matter release acids.

Seasonal issue: Fall leaf drop and spring pollen/debris common in the mid-cities west of DFW Airport. Regular skimming prevents pH drops.

pH Adjuster Safety

  • Always pre-dissolve pH increasers in bucket before adding to pool
  • Never mix soda ash directly with other chemicals
  • Add chemicals to water, never water to chemicals
  • Wear safety goggles when handling dry chemicals
  • Store pH increasers in cool, dry place away from acids
  • Undissolved soda ash can permanently stain pool surfaces

pH Raising Chemical Options

Soda Ash (Sodium Carbonate)

Best for: Quick pH correction when alkalinity is normal

Pros:

  • • Fast-acting pH increase
  • • Doesn't significantly raise alkalinity
  • • Economical for large adjustments
  • • Available at all pool stores

Cons:

  • • Can overshoot target pH
  • • Must be pre-dissolved
  • • Temporary cloudiness if added too fast

Dosage: ~6 oz per 10,000 gallons raises pH by 0.2

Sodium Bicarbonate (Baking Soda)

Best for: When both pH and alkalinity are low

Pros:

  • • Raises both pH and alkalinity
  • • Very safe and gentle
  • • Readily available (food grade works)
  • • Less likely to overshoot

Cons:

  • • Slower pH increase
  • • More expensive than soda ash
  • • Large quantities needed

Dosage: ~12 oz per 10,000 gallons raises pH by 0.1

Step-by-Step: How to Raise Low pH

1

Confirm Low pH Reading

Verify pH is below 7.2 using accurate testing

⚠️ Warning: pH below 6.8 can cause rapid equipment damage and skin irritation

2

Test Total Alkalinity

Check alkalinity as it affects pH stability

⚠️ Warning: Adjust alkalinity before trying to fix pH for stable results

3

Identify the Cause

Determine why pH dropped to prevent recurrence

⚠️ Warning: Address root cause or pH will continue dropping

4

Choose pH Increaser Type

Select appropriate chemical based on situation

⚠️ Warning: Never add more than recommended dose at one time

5

Add Chemical Safely

Proper addition technique prevents damage

⚠️ Warning: Undissolved chemicals can stain pool surfaces permanently

Low pH Correction Costs

🔧 DIY Attempt

Estimated Cost:$5-20
Time Required:4-8 hours
Difficulty:Easy

⚠️ Risks:

  • Over-correction causing high pH
  • Surface staining from undissolved chemicals
  • Temporary water cloudiness
  • Inadequate mixing causing uneven chemistry

👷 Professional Service

Service Cost:$75-125
Completion Time:Same day service

✅ Includes:

  • Comprehensive water testing
  • Root cause identification
  • Proper chemical selection and dosing
  • Safe chemical addition techniques
  • Complete water balance restoration
  • Prevention recommendations

Detailed Cost Breakdown

Item/ServiceLowHigh
Soda ash (sodium carbonate)$3$8
Sodium bicarbonate (if needed)$5$15
Water testing supplies$2$10
Total Range$10$33

💰 Value Tip: CoOpPools offers transparent pricing with no hidden fees. Our worker-owned model means fair prices and invested service.

Preventing Low pH Problems

Prevention Tips

Prevention saves thousands in equipment replacement and surface refinishing. Low pH damage is often permanent and expensive to repair.

1

Regular pH Testing

Test pH and alkalinity weekly, more often during heavy use or rain. pH below 7.2 causes immediate damage. Catch drops early before equipment corrosion begins. Use liquid test kits for accuracy.

Frequency: 2-3 times weekly
Homeowner Friendly
💰Saves: $1000-3000/year preventing equipment replacement
2

Chlorine Type Management

Avoid overuse of acidic chlorines (trichlor tabs, dichlor shock). Balance with liquid chlorine or cal-hypo. Monitor CYA buildup from stabilized chlorines that also lower pH.

Frequency: Ongoing
Some Experience Needed
3

Weather Monitoring

Test after heavy rain which can drop pH significantly. Consider covering pool during storms. Some areas have naturally acidic rain that affects pools regularly.

Frequency: After rain events
Homeowner Friendly
4

Professional Water Management

Weekly service includes proactive pH monitoring, alkalinity buffering, equipment inspection for corrosion, and prevention programs to maintain optimal chemistry balance.

Frequency: Weekly service
👷Professional Recommended
💰Saves: $2000-5000 preventing surface and equipment damage

🏊 Pro Tip: Regular professional maintenance prevents 90% of pool problems.Get your maintenance quote today

Need Professional Help?

Our water chemistry experts quickly and safely raise pH levels while protecting your expensive pool equipment. We'll also identify and address the root cause to prevent recurring problems.

Mention "low pH issues" when calling for faster service

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