Tropical Fish Tank

Most tap water contains chlorine and ammonia which can kill your fish. 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 who 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.

Fish constantly add waste and toxins to the tank environment, so a filtration system, like an under-gravel filter, is essential to keeping the water clear and safe.