Aqua Medic Sulfur Pearls 1 liter

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Aqua Medic Sulfur Pearls are formed from pure sulphur. They are used in Sulphur nitrate reactors as the filter medium and energy source for the bacteria. They have to be replaced from time to time as they are slowly consumed by the bacteria. Caution: Use only in nitrate removing anaerobic filters having a low water flow rate.