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All of our aquatic plant foods have minimal impurities, and are suitable for the do-it-yourselfer with experience in handling chemicals. Most are available in 1 lb. quantities.  Please do not ask to be sold or sent fertilizers in smaller quantities.

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Ferrous Gluconate

8 oz. food grade ferrous gluconate.
100% ferrous gluconate dihydrate
Mix and dose iron compounds separately from other fertilizers to avoid tank cloudiness. Adding a small amount (3-5ml) of  vinegar to the solution will help the iron be bioavailable.

Mix 1/8 cup (20 g) ferrous gluconate in 1/4 cup water (62.5 ml) water to make 10,000 ppm solution. Add 1/8 teaspoon (1.25 ml) of this stock solution to 12.5 gallons (47.3 L) water for an initial concentration of 0.26 ppm. Periodically add stock solution at this dosage or as required to maintain about 0.10 ppm iron in solution.


$ 13.00

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