Water Chemistry Problems
Solutions for cloudy water, algae, pH issues, and chemical imbalances
Chemical Safety Warning
Many water chemistry issues require handling dangerous chemicals. Improper mixing can create toxic gases. Always wear protective equipment and never mix different chemicals. When in doubt, call a professional.
Most Common Water Chemistry Issues
Cloudy Water
Water appears milky, hazy, or dull. Cannot see bottom clearly.
Common Causes:
Quick Fix:
Check filter pressure and clean if needed. Test and balance water chemistry.
Green Water (Algae)
Pool water has green tint or is completely green. Slippery surfaces.
Common Causes:
Quick Fix:
STOP - Professional service required. Green water indicates dangerous bacteria.
High Chlorine Levels
Strong chlorine odor, burning eyes/skin, bleached swimsuits.
Common Causes:
Quick Fix:
Stop adding chlorine. Let sunlight break it down or use sodium thiosulfate.
High pH
pH above 7.6. Chlorine less effective, scale formation likely.
Common Causes:
Quick Fix:
Add muriatic acid in small doses. Never more than 1 lb per 10,000 gallons at once.
All Water Chemistry Problems
Yellow/Mustard Algae
HardYellow or mustard-colored deposits, typically on shady side of pool.
Black Algae
ProfessionalDark blue-green to black spots firmly attached to surfaces.
Pink Slime (Bacteria)
ModeratePink, red, or orange slimy coating in corners and crevices.
Low Chlorine Levels
EasyChlorine tests below 1 ppm. Water may smell off or feel slimy.
Chlorine Lock
ModerateHigh CYA preventing chlorine effectiveness despite normal levels.
Low pH
EasypH below 7.2. Water acidic, stings eyes, damages equipment.
High Alkalinity
ModerateTotal alkalinity above 120 ppm. pH resistant to change.
Low Alkalinity
EasyTotal alkalinity below 80 ppm. pH unstable, bounces easily.
Metal Staining
ModerateBrown, green, or purple stains on surfaces from metals in water.
Scale Formation
ModerateWhite crusty deposits on surfaces, especially waterline and heater.
Foaming Water
EasyExcessive foam or bubbles that don't dissipate quickly.
Strong Chemical Smell
ModerateStrong chlorine odor, especially indoors. Often indicates chloramines.
High Phosphates
EasyPhosphate levels above 100 ppb feeding algae growth.
Salt Level Problems
EasySalt too high or low for salt chlorine generator operation.
When to Call a Professional
Safety Concerns
- • Strong chemical odors
- • Skin or eye irritation
- • Breathing difficulties
- • Chemical mixing accidents
Persistent Problems
- • Issues lasting over 5 days
- • Problems that keep returning
- • Multiple issues at once
- • Failed DIY attempts
Complex Issues
- • Green pool water
- • Black algae infestations
- • Severe chemical imbalances
- • Equipment-related chemistry issues
Need Professional Help?
Our worker-owners are water chemistry experts. We'll diagnose and solve your problem safely and effectively.
Mention "water chemistry issues" when calling for faster service
Prevent Water Chemistry Problems
Test Weekly
Test water 2-3 times per week during swim season
Balance First
Always balance pH and alkalinity before adding chlorine
Circulate Daily
Run pump 8-12 hours per day for proper circulation
Professional Care
Weekly service prevents 90% of chemistry problems