POOL PUMP AND FILTRATION SYSTEM:
1. Not enough hours of filter operation or inadequate filtration caused by the improperly sized filter (especially with cartridge filters).
2. A filter that is cleaned too often (some debris actually helps in the filtration process) or too much backwashing.
3. Your filter (sand/ cartridge etc.) needs to be properly cleaned and also checked for wear and tear.
4. An inadequate pump that does not circulate your pool properly or poor positioning of the return jets. (Keep in mind that it’s not the biggest and most expensive pump that can prevent this problem, but the correct pump for your pool.)
5. There might be bio film build-up in the filtration system.
6. If your pool tends to gather a large amount of dirt in a short period of time. This can be garden debris, building dust and debris if you are busy with home improvements. Chemical sprays that you use in your garden can also cause cloudy water.
a. HEATING SYSTEM, WEATHER AND SUNLIGHT:
7. If you use the heater excessively, it can cause sanitizer to be used up more quickly.
8. If you have a solar heating system, the system might not be chemically treated to prevent and kill algae and bio film build-up.
9. Your solar blanket needs to be cleaned or – worst case scenario – replaced. Bio film can build up on the side that touches the water.
10. Your pool is in a shady spot and does not get enough sunlight.
11. Rainfall can cause cloudy pool water. The heavier the rainfall, the worse, because heavy rainfall can actually wash dirt and debris into your swimming pool.
As you might have realized by now: there are many reasons for cloudy pool water. The easiest way to determine the problem and come up with a solution is to test your water or have it professionally tested by your local pool center.
Whatever you do to fix the problem, never guess what you should do. Guessing can only make the problem worse and will almost certainly turn a little problem into a very expensive one.