| SYMPTOM |
PROBABLE CAUSE |
UNDERLYING REASON |
TO RECTIFY |
| Chlorine level difficult to maintain |
Sunlight destroys chlorine |
Chlorine not stabilised |
Add stabiliser to preserve chlorine levels |
| |
or |
|
|
| |
Insufficient chlorination |
Build up of pollutant |
Super-chlorinate |
| |
or |
|
|
| |
High water temperature |
Organisms multiply more quickly/chlorine liberated from pool easily |
Increase dose rate of sanitise |
