Description
VisiTherm heaters are automatic submersible heaters for use in fresh and saltwater aquariums in the home.
Easy to set the temperature
The desired temperature is easily set. Simply dial the regulation pin on the top of the heater to change the set temperature. You can see where the temperature is set on the front of the heater.
Safer than ordinary glass heaters
These heaters also offer additional safety because the tubes are suitably thick making them extremely resistant to knocks.
Size guide
This Aquarium Systems range of high precision heaters are available in six sizes. The size that you need depends on your ambient room temperature, a size guide is given below:
- 25W heats 15 – 25 litres
- 50W heats 25 – 50 litres
- 100W heats 50 – 100 litres
- 150W heats 75 – 150 litres
- 300W heats 150 – 300 litres
If your room temperature is very cool, allow more wattage for heating the tank properly.
If your aquarium is larger than 300 litres, you can use two heaters. Use the above guide.
For example, a 350 litre aquarium in a cool room would need 1 x 300W and 1 x 100W heaters.
How to work out your aquarium’s volume
If you are not sure how large your aquarium is, it is easy to work out. Measure the length, width and height of the tank in cms. Times those three measurements together. Then divide the result by 1000. This will tell you how many litres the tank can hold. Allow some displacement for the aquarium décor. Remember that if you have an external filter or sump tank, these can also increase the aquarium volume. You can work out the extra volume in the same way.
(L X W X D)/1000=litres
How to measure temperature
Even though we’ve found these heaters to be extremely reliable, we still recommend checking the aquarium temperature regularly. At Cornwall Aquatics, we take a quick look at the thermometer every time we feed the fish. Here are some thermometers that we sell:
Thermometer – JBL Digital Strip
Also, if you keep a marine aquarium, the Hanna Salinity Tester is a great way to check temperature too.
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