Reef Builder

Seachem Reef Builder is a high quality blend of carbonate sources designed to safely and efficiently raise the carbonate alkalinity of marine aquariums, without reducing essential calcium, magnesium and strontium as well as providing zero impact on delicate pH levels. The alkalinity of your aquarium should be maintained at 3 - 5 meq/L (8 - 14 dKH) and for safety, the alkalinity levels should not fall below 2 meq/L.