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I am following Left C's instruction to mix Potassium (Add 51.0 grams K2SO4 to 500 mL of distilled water for F. Potassium Substitute) as I am following the Seachem Dosing Chart.

I tried your suggestion and it still doesn't dissolve all the way. Does that mean I need to increase the dosage? I was thinking of doing that anyway as my plants still seem to be showing a potassium deficiency.
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