Supplement containing highly concentrated iron. Iron is an important micronutrient absorbed by corals and sea anemones. Regular and balanced iron supplementation provides intense green coloration of corals. Iron plays an important role in the process of photosynthesis, therefore its supplementation improves the coral nutrition process. Especially supports green coloring of Acroporas as well as other SPS corals. Dosage: 1 drop per 100 liters (27 US gal) daily. Recommended level of iron in reef aquariums is 0,006 0,012 mg/l (ppm). 1 ml of Iron (~15 drops) in 100 l (27 US gal) raises the iron level in water by 0.005 ppm = 5 ?g/l. It is important that each aquarium is different and the dosage depends on the coral cast and individual needs. Do not overtighten the screw, otherwise the cover might be damaged.