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K2PO4 vs KH2PO4

I bought the wrong stuff. I know I should have ordered K2PO4 instead of
KH2PO4 for dosing potassium. I have KNO3 for dosing nitrate. I know I can
use KH2PO4 for phosphate dosing, but what should I do about K-potassium
dosing? Should I just assume the plants are getting enough from the
KH2PO4-mono potassium phosphate and KNO3-potassium nitrate?

I checked the other evening and my NO3 was 40ppm! I did a large water