Aquarium Systems VisiTherm Submersible Heater

5 reviews

Aquarium Systems VisiTherm Submersible Heaters are available from Swell UK to allow the quick and accurate heating of your aquarium water to the right temperatures to support the aquatic life inside your tank. Best used with tropical tanks that need a little temperature boost.


  • Visitherm 25w 10% OFF With Code
    code: 210536 In stock Only 2 left in stock
  • Visitherm 50w 10% OFF With Code
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  • Visitherm 100w 10% OFF With Code
    code: 210538 In stock Only 1 left in stock
  • Visitherm 150w 10% OFF With Code
    code: 210539 In stock Only 3 left in stock
  • Visitherm 200w 10% OFF With Code
    code: 210540 In stock Only 3 left in stock
  • Visitherm 300w 10% OFF With Code
    code: 210541 In stock Only 3 left in stock

Product Information

Designed for use in fresh and salt water aquariums and for amphibians such as a frogs or turtles. The Aquarium Systems VisiTherm heater is a versatile and efficient addition to your set up. The heater has recently been redesigned with practicality and proficiency as a priority. The heating elements have been improved to a high standard and double encased in a quartz sleeve.

The double insulated casing allows for complete submersion of the sleeve, and this coupled with sensitive heating elements, provide and sustain the correct temperature for your tank. An easy to read thermometer style gage means you can monitor the temperature without disturbing aquatic life.

A convenient control knob sits atop the unit meaning that you can set the heater at the desired temperature easily and quickly.

Available for the smallest and largest aquariums, from 20 litres to 300. Please see the product specification for details on the correct VisiTherm heater for your tank.

As always, should you need any advice or further information please contact our sales team on 0161 351 4700.

Key Features:

  • Suitable for use with fresh, salt water and amphibian aquariums.
  • Improved design increasing accuracy and efficiency.
  • Easy to use; simply submerge and turn the control knob to set temperature.
  • Visible thermometer style indicator.
  • On/off light indicator.
  • Shock resistant, durable quartz sleeve.
  • Suction cups and support clips included.
  • Five year warranty.

Aquarium Size:

  • 25w - 20-30ltr
  • 50w - 30-50ltr
  • 100w - 100-150ltr
  • 150w - 150-200ltr
  • 200w - 200-300ltr
  • 300w - 300ltr

Product Specification

Product Size Guarantee Wattage
Aquarium Systems Visitherm 25w 21cm 5 Year 25w
Aquarium Systems Visitherm 50w 26.5cm 5 Year 50w
Aquarium Systems Visitherm 100w 27cm 5 Year 100w
Aquarium Systems Visitherm 150w 33cm 5 Year 150w
Aquarium Systems Visitherm 200w 32cm 5 Year 200w
Aquarium Systems Visitherm 300w n/a 5 Year 300w

Latest Customer Reviews

  • Rating
    Date 05/09/2018 14:09pm
    Aquarium Systems Visitherm 300w
    Feefo Logo
    Made the water in my aquarium warm and continues to do so
  • Rating
    Date 13/08/2018 11:08am
    Aquarium Systems Visitherm 300w
    Feefo Logo
    I always use Visitherm heaters.
  • Rating
    Date 22/07/2018 06:07am
    Aquarium Systems Visitherm 25w
    Feefo Logo
    Used for just over a week now and no problems very easy to adjust temperature completely satisfied so far
  • Rating
    Date 09/05/2018 06:05am
    Aquarium Systems Visitherm 150w
    Feefo Logo
    Breakable aquarium heater packed well and delivered promptly. Working well so far but of course only been in the tank a few days. Looks well constructed and easy to adjust setting for temperature.
  • Rating
    Date 21/04/2018 12:04pm
    Aquarium Systems Visitherm 300w
    Feefo Logo
    I find these to be very reliable heaters.