To answer this question, tailored for YOUR pool, you need to test the water or have it tested. The rarely – if ever – is a single reason for your pool water to be cloudy. Cloudiness can be caused by the following situations:
1. Poor pool maintenance. (Need I say more? You cannot complain about a cloudy pool if you do not make sure that it stays clean.)
2. The pool is not used often enough and results in poor circulation.
3. The pool is used excessively without the correct amounts/ levels of pool chemicals.
4. Waste that gets into your pool, but cannot be filtrated properly. This includes waste from swimmers such as lotions, cosmetics, bodily fluids etc.
5. The pool is not brushed and vacuumed on a regular basis.
6. Your pool toys are dirty and this causes you pool sanitizer to work harder and therefore needs to be checked and balanced more frequently.
POOL WATER THAT IS NOT BALANCED:
7. Inadequate oxidizer/sanitizer levels that can be the source of early algae growth.
8. Your pool’s pH is not properly balanced and this prevents the chlorine from working efficiently.
9. Water hardness can also be the reason for cloudy water and should be balanced.
10. There might be traces of iron, manganese or copper in the water.
11. Household chemicals came into contact with your pool.
12. Your pool gets filled up with a dirty garden hose or the water that you use is treated with chloramines instead of chlorine. (While chloramines adequately treats the water for harmful bacteria, it does not have the same strength to get rid of other elements in the water – that might be safe to ingest, but does not help your pool stay crystal clear.)