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I got some Potassium Phosphate KH2PO4​ and was wondering what to do with it. Came across an article that showed a boost in germination rate. But they added a bit of H2O2 with the water. I used rain water with a 23 ppm/pH 6.6 start 20mM of H2O2 or, 2.35 mL/gr of 35%, 23 mL/gr of 3% per Liter...

I got some Magnesium Carbonate (MgCO3) to see if it works good for pH up buffer. And so far so good. It's otherwise know as chalk for weigh lifters. First test was a gallon of 1/2 nute mix at 6.1pH. A 1/4 gram and sitting over night the pH rose to 7.4 Got three gallons of rain at 6.2 pH and...