Under normal circumstances during the swimming season, your pool water level will drop about 1/4 inch per day due to evaporation, splash out, and back washing your filter. The use of a solar blanket will help reduce evaporation. To Test For A Leak Using a garden pail, draw a line about 1? from the top with an indelible marker. Fill the bucket to the line with water and sit the bucket in the pool on the top step. Accurately mark the pool water level. The easiest way is with a piece of black tape on the leg of your pool ladder. If the water loss from the pool is greater than the water loss from the bucket, then your pool is leaking.
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