Visi-Therm automatic aquarium heater has a unique direct-reading temperature setting feature, which eliminates guess work and makes presetting temperatures very simple. The desired temperature is indicated on an easy-to-read thermometer-type scale and is accurately maintained by the precision thermostat. Visi-Therm is completely waterproof and totally submersible. All these features make it the choice of experienced aquarium hobbyists.
Available in 6-inch length 25 & 50 watts, 10-inch length 75 & 100 watts, 12-inch length 150 & 200 watts, and 14-inch length 250 & 300 watts
These heaters seem to have a great thermostat on them... I set my when I setup my last tank... my temperature has stayed at the temperature that I set and has never moved... seems to work great .. and never really needs to be adjusted for seasons or anything like that....
has used this product for 3 Years or More.
Overall Rating: 10/10
I have used this heater for 10 years and have never had any sort of "disaster" happen, such as cooked or frozen fish. it is veryacurate and is very esey to set to the needed temperature (the nob is kind of hard to turn though).
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