ESV Calcium Hydroxide (Kalkwasser Powder) 1600g

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One of the very few effective methods of maintaining calcium concentration and alkalinity with a single product, Kalkwasser Powder is a proven standard in the aquarium hobby. Commonly used in conjunction with auto-top off systems, calcium provided is directly used by calcifying organisms. This pure Calcium Hydroxide product meets American Water Works Association and Water Chemical Codex requirements.