A typical method is to use 1 per 12cm x 12cm area in a well planted tank. If your tank is a new set up put them where your thinking of planting 1st. 0.01% Boron (B) 0.006% soluble in water. 0.025% Copper (Cu) 0.017% soluble in water see note below.
0.22% Iron (Fe) of which soluble in water, chelated by EDTA 0.033%. 0.01% Molybdenum 0.008% soluble in water. This item is in the category "Pet Supplies\Fish & Aquarium\Feeders".
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