Aquaforest AF Build is a balanced reef additive that speeds up how corals take in the calcium and carbonates they use to build their stony skeletons. It helps hold a stable pH and improves water clarity, while supplying a measured dose of calcium, carbonates, and iodides for steady SPS and LPS growth. It also helps suppress nuisance blue-green (cyano) and hair algae. Benefits Speeds calcium and carbonate uptake for stony skeleton growth Supplies calcium, carbonates, and iodides in a balanced dose Helps maintain a stable pH and improve water clarity Helps suppress blue-green (cyano) and hair algae Suitable for SPS, LPS corals, clams, and filter feeders How to Use Dose one drop per 100 L (27 US gallons) every other day, with the aquarium lights turned off. Shake well before use. Specifications Type Liquid coral growth additive Ingredients Carbonates, calcium, and iodides Best for SPS, LPS corals, clams, filter feeders Size 50 mL Dose 1 drop per 100 L (27 US gal), every other day Application With aquarium lights off Water type Saltwater (reef) Recommended Pairings Aquaforest AF Energy a concentrated coral food Aquaforest AF Vitality coral vitamins for color and immunity Aquaforest AF Growth Boost amino acids for coral growth and color Browse the full Aquaforest collection FAQ What does AF Build do?It accelerates how corals take up calcium and carbonates so they can build their stony skeletons, while helping hold a stable pH and clearer water. Does it replace my calcium and alkalinity dosing?No. AF Build supports and speeds uptake, but it does not replace a balanced calcium and alkalinity program. Use it alongside your main supplement routine. Which corals benefit most?SPS and LPS corals, plus clams and other filter feeders. When should I dose it?Every other day, with the lights off. Shake the bottle before each dose.