Calcium Hydroxide (Kalkwasser Powder) 4 lbs. E.S.V.

Calcium Hydroxide (Kalkwasser Powder) is a tried and true method to maintain proper calcium and pH levels in reef aquaria. Mix with fresh water and add as needed to top off the aquarium for evaporation.

Calcium Hydroxide is the proven standard for maintaining calcium concentration and alkalinity in closed marine aquaria. The calcium provided is directly used by calcifying organisms, and the hydroxide ions provided readily convert dissolved CO2 into bicarbonate and carbonate ions, which are also directly used by calcifying organisms. The net result is no ionic imbalances in the aquarium water, which can occur through the prolonged use of other calcium supplements, such as calcium chloride. Our product is extremely pure and meets American Water Works and Water Chemicals Codex Specifications. This means it's pure enough to be used in low-levels as potable water additive by water municipalities. Due to the high pH of Calcium Hydroxide solutions, its important to add slowly (dripping is best) to your system so as to prevent localized precipitation and the resultant loss of alkalinity. Our packaging includes lot number, date tested, and the date filled. We also provide complete instructions for use.

Thank you for your interest in ESV. We are a family owned and operated chemical specialties business, established in 1932. Our many years in the chemical industry and aquarium hobby, combined with my experience as a marine biologist, enable us to bring the marine aquarist high quality specialty chemicals at very low prices.