Which granular hydroponic fertilizers are made with food grade MPK (KH2PO4)? ANYONE?

Discussion in 'DIY and Homemade' started by Old School Plant Food, Jul 22, 2016.

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  1. #1 Old School Plant Food, Jul 22, 2016
    Last edited: Jul 22, 2016
    Which granular hydroponic fertilizers are made with food grade MPK (KH2PO4), and other high purity ingredients?
     

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