I have never seen 0 alkalinity. I have seen some 4 and 6 s but not 0.

Did you fertilize yet ? If so describe what you did.

It is hard to resuscitate a plankton bloom in cool water with falling temps even with good alkalinity.

Soil test is a great idea !!! It may tell you that something else is going on.






Attached Images
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Last edited by ewest; 11/06/19 12:48 PM.