Any cat can get lost even yours. A tank full of fish offers a window through which you can observe nature in miniature. But fish are fragile. You ll need to spend time, money, and energy to keep them alive and their environment healthy. Get an additive from your pet-supply store to neutralize these toxins.
Uneaten food turns into toxins in the tank.
So feed your fish small amounts of food once or twice a day. Only feed them what they can eat in about three minutes. Some fish are so fragile that a temperature drop of a few degrees will kill them, so get a quality water heater for your tank. Choose fish that require the same environmental conditions. Keep your tank out of direct sunlight and away from a heating or cooling source to avoid algae growth and water temperature fluctuations.