Raises carbonate alkalinity (KH) for optimal coral growth
Does not immediately impact pH, allowing long-term stability
Will not deplete calcium, magnesium, or strontium when used properly
Bulk and powdered formats for flexible dosing in various tank sizes
Can be used alongside reef buffer for comprehensive alkalinity management
Summarized by Shop
Seachem Reef Builder is a dry blend of carbonate salts that raises carbonate alkalinity (KH) in a reef aquarium without immediately changing pH. Alkalinity is what keeps your pH stable and gives stony corals and coralline algae the carbonate they need to build skeleton, so when it drifts low your whole tank gets harder to keep steady. Ree