This calcium from Two Little Fishies supplement replenishes calcium and maintains alkalinity in marine reef aquariums. It also precipitates phosphate from the water and thus promotes a cleaner, healthier aquarium for growing corals, clams, and calcareous algae. A pure source of calcium hydroxide. One pound makes up to 225 gallons of mix. Use drip system or dosing pump to dispense into aquarium system.
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