In addition to kowing how to clean a fish tank, pumps, tools, plants and filters, etc, you will need test kits. The kits are scientifically designed to test chemicals in water. Test kits will help you clean your fish tank and monitor the quality of water to avoid over consumption of nitrates, ammonia, nitrites, etc. You can test pH balance with test kits as well. Fish produce a certain amount of ammonia through waste, which can be converted to nitrites, which fish feed off. To fish, nitrites are non-toxic since they too produce these chemicals.You can also purchase water treatment to help you clean your fish tank and maintain water quality. Chlorine treatments are ideal, since tap water tends to include chloramines and chlorine. Fish do not take kindly to these two chemicals. Online, you will find in the fish section a wide array of fish care videos, chlorine and water treatments available. In addition, you can find such treatments where aquariums and fish are sold. If you are, just purchasing fish and aquarium for the first time go online and learn about starter kits, as well as beginner fish. Some fish are easier to take care of than other types of fish. In the fish category, you want to look up information that will help you relate to saltwater fish and freshwater fish. Freshwater fish include the tropical and Coldwater fish.