Fish Tank Heater Tips For Cold Weather
It is always a good time to make sure that your aquarium heater is in good condition and working properly. Aside from certain cold-water species, most aquarium fish need warm water, ideally between 25 ºC and 30 ºC (76 ºF to 85 ºF), with tropical fish wanting between 24 ºC to 27 ºC (75 ºF to 80 ºF).
With the Met Office warning of a brisk and cold winter, it is even more important to keep the water temperature at a constant to help keep your fish’s immunity strong, to help ward away diseases such as ich, which has a high mortality rate if not caught and treated early.
We have some helpful and important tips for keeping your fish safe and happy over winter!
- Check your heater size
A good rule of thumb to follow for aquarium heaters is 5 watts per gallon for aquariums 55 gallons or smaller, and 3 watts per gallon for aquariums over 60 gallons. If the aquarium is in a particularly cold room, or against an external wall, then use a larger or second heater.
- Check the condition of your aquarium thermometer, are there cracks or other damage?
Before removing the heater from the aquarium, switch it off and allow it to cool for 30 minutes. If there are any signs of damage or wear, then replace the heater. Remove mineral deposits or algae build-up to improve performance and reduce the risk of overheating. After returning your heater to the aquarium, wait at least 30 minutes before plugging it back in.
- Check the indicator light
If you have an adjustable heater, check to make sure the indicator light is working. If the light is off, slowly rotate the control dial until the indicator comes on and place your hand lightly on the lower portion of the heater tube to see if it is generating heat. Once satisfied the element is working, reset the dial to the desired temperature.
- Consider the right placement for your heater inside the aquarium
You should place the heater near a filter inlet or outlet or a circulation pump to ensure the heat is evenly distributed. Submersible heaters can be installed horizontally near the bottom of the tank, or vertically if you prefer. Ensure tank decorations are kept away from the heater so that water can freely circulate.
- Know the right way to make temperature adjustments
Using a tank thermometer, compare the readings to the heater settings. Controllable heaters may need adjustment to achieve the right water temperature, deepening on the placement of the aquarium, the ambient room temperature, and water circulation.
When making adjustments to your heater, allow several hours before checking the results. Do not change your aquarium's water temperature suddenly or dramatically, as this can stress your fish!
Here are some additional important safety tips:
- Always unplug your heater and let it cool for at least 30 minutes before removing it from the water
- After installing your heater in the aquarium, allow at least 30 minutes before plugging it in
- Always use a drip loop and make sure the cord and plug are dry when plugging your heater in
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