Tropical fishes live in climates that are warmer than the typical temperature that most fishes live in. To rear them at home, your fish tanks and aquariums have to be heated to raise their temperature artificially.


Heating your fish tanks and aquariums is not a difficult task, but maintaining them at a constant temperature is even more important than heating your tank. Your fishes aren’t too particular about living at a specific temperature. In fact, most tropical fishes can live in a range of temperatures. However, a fluctuating tank temperature will cause a lot of stress to your fishes.

There are options that you can choose for heating and maintaining the temperature of your tropical fish tanks. The three main types of heaters for fish tanks. They are hang-on heaters, submersible heaters and filter heaters like the ones here

Hang-on heaters, as their name suggests, hang onto your tanks from the top. They are partially submerged in the aquarium, with the heater control above the water line and the heating element under it. These heaters have the longest history of use and are very reliable. However, their hanging over the top of the aquarium is an unwelcome feature to most owners who are concerned with the aesthetic design of their fish tanks.

Submersible heaters are fully submerged inside your tanks, and they have a slim design which helps to conceal their presence in your tank. They are slightly more expensive than hang-on heaters but are much less obtrusive in appearance.

Filter heaters are the ultimate heaters for hobbyists who do not want to have any mechanical parts inside their fish tanks. These filters are installed where the external filter is located and heats up the water that flows through the filter. However, if your filter pipe is fairly long and located at a distance from your tank, the temperature control of your tank will be less reliable because of the heat loss from the water before reaching the filter heater.

Filter heaters are much more expensive than common heaters, but they are worth the premium if you are seeking to create a fully natural fish tank.

Besides the type of fish tank, the size and rating of your heaters are important. Naturally, the bigger your tank, the larger the heater you will need. As a rule of thumb, you should go for a 25-watt heater for 5 gallons of water and every increase by 10 gallons of water; you should increase the size of your heater by 25 watts.

A good heater will last you for a long time without you having to worry about temperature regulation in your fish tanks.