Test your potassium if you haven't recently. Biopellets suck it from the water, and lots of salt is low in it. Seems to be a major cause to either the crash or SLOW recovery in my tank. This past 2 weeks adding potassium i've had better results than everything i've tried in the past 2 months.
To think... it was a $20 bottle... after spending ?? on other fixes... don't tell my wife
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