Fill the tank with de-chlorinated water and attach filters and lighting. Allow the tank to cycle until the water is no longer cloudy and sufficient P.H and water temperatures have been established. Now it is time to purchase the fish! Buy hardy fish such as danios, barb, gouramis, and live bearers. They should be able to withstand the high nitrite levels and ammonia in the new aquarium. Live plants should be pruned weekly. Dead or broken leaves should be removed daily. A live plant aquarium will require the same basic equipment needed for an aquarium containing fish. The basics are as follows. You will need a tank, some sort of filtration system, lighting and some basic cleaning tools. Coldwater Aquarium Set-up and Care As the hobby of having an aquarium becomes more and more popular, it should be noted that the easiest aquarium to care for and set up is a coldwater tank. As the name suggests, coldwater tanks require no heating set up. This cuts costs when setting up your first tank. One reason that freshwater fish are hardier than saltwater fish is the saltwater itself. Just like any living creature, a fish's body requires water in order to function properly. Water is absorbed through a fish's skin in the freshwater environment. Alternatively, a saltwater fish actually has to drink the salt water, because the body fluids are extracted through the skin by osmosis. Usually these ancient aquariums only had one side that was made of glass, with the other three sides being made of metal or wood. Most aquariums consisted of fish that were native to the region of its owner simply because of availability. Also most old school fish tanks contained only fresh water fish. Try to keep the fish relatively the same size. It has been said that if a fish is small enough to fit in another fishes mouth, that is usually where it ends up. So don't be discouraged if this happens. Even fish that have been housed together for several months have been known to disappear on occasion.