Home › Homeowners › Common problems
❓ Common problems
Common pool problems and fixes
Quick fixes for the most common homeowner problems. Test your water first, follow product labels, never mix chemicals, and call a pro for electrical, gas, or leak work.
1. Cloudy water
Usually weak filtration, a dirty filter, or unbalanced water. Test and balance pH and chlorine, run the pump longer, clean or backwash the filter, and brush. If it stays cloudy after a few days, a pro can check stabilizer and filter condition.
2. Green water
Algae from low chlorine. Test, bring pH to about 7.2–7.4, brush, clean the filter, shock per the label, and run the pump nonstop until clear. Retest and repeat as needed.
3. Strong chlorine smell or red eyes
That smell usually means chloramines, not too much chlorine. Test free chlorine and shock to burn them off, and keep pH between 7.2 and 7.8. Rinse off before swimming.
4. Chlorine will not hold
Sun burns off chlorine when stabilizer (CYA) is low, under about 30 ppm, or when algae and heavy use create demand. Test CYA, add stabilizer if low, and shock if the pool is dirty.
5. pH keeps rising
Common with salt systems, new plaster, and water features. Add acid per the label after testing, and check alkalinity, since high alkalinity makes pH drift up.
6. Foam on the water
Often from sunscreen, lotions, or algae treatments. Skim it off, balance the water, and give it time. Persistent foam can mean high organics, so shock and clean the filter.
7. White scale on tile or walls
Hard, crusty deposits point to high calcium, pH, or alkalinity, and heat makes it worse. Balance the water. A pro can remove heavy scale and advise whether to drain some water.
8. Rust or metal stains
Brown, green, or black stains can come from metals in fill water or corroding equipment. A stain treatment, a metal sequestrant, and balanced water help. Ask a pro to find the source.
9. Pink slime or black spots
Pink slime is bacteria and black spots are stubborn algae. Brush hard, shock, treat spots as the product label directs, and clean toys and gear that may carry it back.
10. Water level dropping
Do the bucket test: set a bucket filled to the pool level on the first step and compare after 24 hours. If the pool drops more than the bucket, you likely have a leak. Call a leak detection pro.
11. Weak skimmer suction or low flow
Empty the skimmer and pump baskets, then check for a clogged impeller, closed valves, low water level, or a dirty filter. If the pump pulls in air, check the lid o-ring.
12. High filter pressure
When pressure is about 8–10 psi above the clean reading, clean or backwash the filter. If it stays high, check for closed valves, a blocked return, or worn filter media.
13. Pump will not prime or shows bubbles
Check the water level, basket, lid o-ring, and valves. Air usually enters on the suction side. Fill the basket with water and restart. Persistent air means a leak a pro should trace.
14. Noisy pump
Grinding or screeching often means failing bearings, and humming can mean a stuck impeller or bad capacitor. Turn it off if it grinds, never run it dry, and call a pro.
15. Heater not heating
Check the thermostat, that the pump is running with good flow, the filter is clean, and the gas valve is on. Fault codes help a technician. If you smell gas, leave and call the gas company.
16. Salt system error or low output
Test salt with a reliable test, check flow and the cell for scale, and reset at the breaker per the manual. Cold water can trigger false low salt errors. Persistent errors need your pro.
17. Pool cleaner not working
Empty the bag or filter, check hoses and wheels for wear, and confirm pump speed and flow are high enough. Robotic cleaners need a clean filter basket and an untangled cable.
18. Breaker or GFCI keeps tripping
Do not keep resetting it. It can signal a wet motor, damaged wiring, or a ground fault. Turn the equipment off and call a licensed electrician or pool pro.
19. Leak at the equipment pad
Drips from the pump shaft seal, a union, or the filter valve need attention. Turn off the pump if water is spraying. Check o-rings, hand-tighten unions, and call a pro for seals.
20. Equipment will not turn on
Check the breaker, the time clock or app schedule, and the automation panel. Make sure the basket lid is tight and valves are open. If nothing responds, call a pro.
21. I cannot tell what my test kit is saying
Basic color-comparator kits, with chlorine and pH color blocks, show total chlorine and pH only. Read in daylight against a white background, use the exact number of drops, and read right away. They cannot separate free from combined chlorine, and very high chlorine can distort the colors. A DPD kit or a pro test is more accurate.
22. Spa or spillover water turns cloudy or foamy
Spas are small and hot, so sanitizer disappears fast and oils, lotions, and soaps build up quickly. Test before each use, shock as the label directs, clean the filter, and shower before getting in. If it stays cloudy or foamy, drain and refill the spa.
23. Water and debris pile up on the winter cover
Pump off standing water with a cover pump, keep the winter water level your cover calls for, and clear leaves and debris so the weight does not stretch the cover. Never walk on a cover, and watch for ice. Call a pro if the cover sags or tears.
24. I do not know what my equipment or valves do
Water flows from the skimmer and main drain to the pump, through the filter, past any heater or salt cell, and back through the returns. Turn the pump off before changing the filter valve, never run the pump with all suction valves closed, and photograph the pad with labels on the valves.
Never mix chlorine products with acids or each other. Add chemicals to water, never water to chemicals. Store them cool, dry, and apart. Barriers, self-latching gates, and constant adult supervision save lives. Learn CPR.