(1 customer review)


Magnesium Sulfate (MgSO4) is a source of Magnesium (Mg), a component of chlorophyll and the transport of Iron (Fe).  Sulfur (S) is essential for root development.

Dosing Instructions

3/4 tsp into 10 gallons will add 10ppm Magnesium

Guaranteed Analysis

Magnesium Sulfate Heptahydrate(MgSO4.7H2O)
Magnesium (Mg) 10.0%
Sulfur(S) 13.0%

Information regarding the heavy metal content of this product can be found at Association of American Plant Food Control Officials


  1. CMF1967 (verified owner)

    Quality ferts that I know I can trust when using the recommended amount in my plated tanks. Thanks!!!

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