In theory, your measurements should be the same if there is no leak in the pool. The 24 hour water level change in the bucket and in the pool level is due to evaporation or rain. General rule of thumb is that most pools in the northeastern United States will drop around 1/4″ per day due to normal evaporation so don’t worry if both water levels drop by 1/4″ or so. Heated pools and pools in dry breezy locations may lose much more.
If the pool water drops 1/4″ or less than the bucket, continued monitoring is advised. If your pool water level drops 1/2″ or more than the test bucket water level in a 24 hour period, it’s very likely that your pool may have a leak. Repeating the static water loss test to verify your results is strongly advised. Running a dynamic test with the pump running through its normal 24 hour cycle and then comparing the static test results can be helpful in pinpointing potential plumbing leaks.
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