Aquarium supplements can help increase or decrease parameters of critical elements (major, minor and trace) in the aquatic environment. Whatever your aquarium's needs are, ASAP Aquarium offers a wide selection of both powdered and liquid additives from the top manufacturers in the aquarium industry including Captiv8 Aquatics, Red Sea, Seachem, Two Little Fishies, Caribsea, API, Kordon, Boyd and many others. Be sure to test your aquarium water for detectable levels before using any additives and always follow the manufacturers instructions to ensure success!