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On our website you can always choose ready-made marine kits of different sizes and configurations https://greenart.su Also in our online store you can choose lamps for reef aquariums https://greenart.su/micmol FORMULA for copper sulfate solution: Aquarium volume in liters × required concentration of free copper in mg/l × 0.00392 = amount of copper sulfate pentahydrate in grams Required concentration of free copper from 0.1 mg/l in mild cases to 0.25 mg/l in severe cases Dilute in 1 liter of reverse osmosis