ESV Calcium Hydroxide (Kalkwasser Powder) 1600g

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.