Potassium Fertilizer for Aquatic Plants NPKM EI Method Planted Aquariums, 16oz FreshWater
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K, Potassium should be used together with N, Nitrate and P, Phosphate, as well as Micronutrient fertilizer. The NPKM fertilizer set can be used for easy E.I. (estimative index) style dosing. Potassium Fertilizer Solution, 16oz pump bottle.