Your aquarium is a home for the fish you keep. This section will introduce you to the items you will need and how they benefit your fish.


Roll over the items in this illustration to learn why you need them in your aquarium.

Filters

Clean water is essential to healthy fish. Debris, dirt and invisible wastes need to be removed before they break down and pollute the water, so filters are used to keep the water clear and clean. The filter will have to be large enough for the tank, and even the best filter won't stop the need for regular changes of water. There are three main types of filter - Internal, External or Undergravel.

Light

Your aquarium should not be exposed to strong daylight, as it can encourage the growth of algae in the aquarium. Many fish tanks come with electric lights, or with the option of installing a light.

Thermometer

Although your water heater may well contain a thermostat, a thermometer is a useful investment. A thermometer is added protection to ensure your aquarium water is at the correct temperature. It will allow you to monitor the effectiveness of your heater, ensuring it is positioned correctly in the aquarium.

Heater and Thermostat

For tropical fish, you will need a heater. Tropical fish need to live in water that is warmed to approximately 23-27°C and this can only be achieved by using a heater in the tank's water. Most modern heaters come with a thermostat included, so you can set the temperature your fish require, and the heater will ensure that it is maintained.

Air Pump and Airstone

For your fish to be able to breathe, it is essential that there is enough oxygen in their water. In nature, rivers and streams pick up air as they flow, but in a still tank there is no mechanism to provide this air. An air pump moves air through the aquarium, and ensures that there is plenty of oxygen for your fish.