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    Jacks 321 vs Masterblend/Calnit/Epsom salt analysis

    Hi! You say that MB 4-18-38 + Mg Sulfate (2:1) = Jacks Hydro 5-12-26 formula but I cant understand how does the additional Magnesium Sulfate increase Nitrogen Potassium and Phosphorus percentages. If anyone can explain me! Thanks :weed::weed::weed:
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