Webspinner Posted December 3, 2018 Report Share Posted December 3, 2018 I recently noticed that all the levels on the tests strips are much higher when the pump is running compared to when the pump has been off for a while. So I'm wondering what is the best time to use the strips, when the pool is calm or after the pump has been running for a long time? Quote Link to comment Share on other sites More sharing options...
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