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VisiTherm Heaters

£16.99£21.99

VisiTherm aquarium heaters are a range of high precision fully submersibles suitable for any type of aquarium

  • 25W heats 15 – 25 litres
  • 50W heats 25 – 50 litres
  • 100W heats 50 – 100 litres
  • 150W heats 75 – 150 litres
  • 200W heats 100 – 200 litres
  • 300W heats 200 – 300 litres

For more information, please read our longer description below

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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
  • 200W heats 100 – 200 litres
  • 300W heats 200 – 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 400 litre aquarium in a cool room would need 2 x 300W 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

Thermometer – JBL Slim Glass

Also, if you keep a marine aquarium, the Hanna Salinity Tester is a great way to check temperature too.

Long warranty

Most glass heaters only come with a one year warrantee. VisiTherm heaters come with a five year warranty!

Additional information

Size

25W, 50W, 100W, 150W, 200W, 300W

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