WATER CRYSTAL A This product is the latest formulated Water Crystal A from German: it can make a degradation of ammonia nitrogen & heavy metal such as nitrite and ammonia nitrogen to be Infinity 0 in water, rapid establishment of living system and rapid purify of water quality, whiten water, remove yellow water and fish feces & remain food so that this product can creates an air aquarium and does not have to change water for very long time if use this product per week. Specially added smallest Water Crystal A which has super- decomposing ability: achieve the efficiency is increased by 200%, and the decomposition rate of feces is faster and remove heavy mental elements. It is a excellent & necessarily product for starting a new aquarium tank and keeping the fish tank clear and crystal for long time. Usages: 1. Start the filtration system and put in the Water Crystal A (dosage: 1g/100L and Water Crystal B (dosage: 40ml/100L) after 24hours you can see the crystal aquarium tank and put fish. 2. Daily maintenance: put in the Water Crystal A (dosage: 1g/100L and Water Crystal B (dosage: 20ml/100L) FOR MARINE WATER&FRESH WATER! Analysis ingredients: poly aluminum chloride 77%, edetate disodium 1.0% Ethylene Diamine Tetra acetic Acid:22%