For the fish-lover, there is nothing as beautiful and peaceful as an aquarium. It brightens up any room in which it is placed, as well as giving the owner a low-maintenance pet. However, not everyone has the space for a large tank. For these people, there is the option of purchasing a smaller aquarium, anywhere from 1 to 15 gallons. Although this size of tank, otherwise known as a "nano aquarium", is harder to maintain, it is still a good choice for many people. They just need to remember a few simple things. The most important thing to keep in mind about a small aquarium is not to let it get overcrowded. Keep the fish small and don't put too many in the tank. Otherwise, it will be difficult to maintain the water quality. Also, take into account the fact that smaller amounts of water change temperature more quickly, which can be stressful for fish. Therefore, try to place your nano aquarium somewhere that keeps a constant temperature year round. And remember that even a small tank can weigh a lot when full, so put it somewhere where it won't need to be moved. In a small tank, water quality can decrease very quickly. It is therefore important to test it every day and change 10-20% of the water as often as twice a week. While doing these changes, vacuum a section of the gravel. If you are busy or just don’t want the hassle of changing your water so often, you could try EcoBio-Stone S. Simply place the stone in the water and it will keep your water clear and healthy for years with beneficial bacteria, which keep the water in the aquarium perfectly balanced by breaking down the toxic ammonia and nitrite from fish waste and uneaten food, and re-supplying trace minerals from the stone. Additionally, be sure to change your filter regularly or else it may leak toxins into the water. If you do notice an issue, attend to it quickly. In a nano aquarium, small problems multiply rapidly. If you wait even one day to take care of them, you may find that your entire system has crashed Another important factor to be considered with a small tank is the oxygen level. One way to keep it high is to agitate the surface of the water with a small filter. For even more oxygen, put live plants in your tank instead of artificial ones. However, be sure to choose ones that don't require a lot of light or you may find your water temperature increasing too much. Finally, do not overfeed the fish in your nano aquarium. This can cause poor water quality and place stress on your fish. If you remember to do all of these things and use a time-released water maintenance product such as EcoBio-Stone you will be able to enjoy keeping fish even if you have limited space.