Vitamins are very easily removed from water by skimming process, ozone or granulated carbon. AF Vitality is a supplement that contains concentrated vitamins for corals. Emphasizes the intensity of the colour and increases the resistance of coral. Supports recovery of stressed and weakened corals after import or disease. AF Vitality contains: vitamin A, vitamin B1, vitamin B2, vitamin B6, vitamin B12, vitamin C, vitamin D3, vitamin E and vitamin K3. Dosage: 1 drop per 100l (27 US gal) Every other day when the light is off.