Aquaforest. AF Build, 50 ml.
Speeds up the adsorption of calcium and carbon required for building up coral skeleton. Contains: iodides, carbonates, calcium. AF Build maintains correct pH level in aquariums and improves water clarity. It lowers the levels of undesirable hair algae and prevents the growth of pathogenic blue-green algae.
Dosing 1 drop for 100l(27 US gal.) every other day when the light is off.