Aquarium Systems Visi-Therm Heater Reviews

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I am very satisfied with this product. It's great for a 10 gallon aquarium. It keeps the water at a constant temperature.

Betty F.

12 July, 2010
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The model I had was supposed to have a "safety feature" where the heater does not work outside of water. It worked for a couple months (both the heater and the safety feature). The heater stopped working entirely inside my fish's tank and, assuming it was broken, I put it down on the ground. A day later I noticed the thing burned a hole in my carpeting and burned my hand. Yes, it was dumb to not unplug it, but considering it's not supposed to work at all outside of water (and wasn't working at ALL inside the water) I wasn't expecting it. I'm just glad it didn't start a fire.

Barbara Moore

03 December, 2009
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I have a 20 gallon freshwater fish tank and this little heater does the trick. Keeps the temp at a nice consistent level. The only problem is that, on the unit I received, the temperature that it is set to is about 2-3 degrees colder than the actual temperature it heats the tank to. If temperature is a crucial factor for you, be sure to have a reliable thermometer in your tank so you can properly calibrate the heater.

Maria F.

24 February, 2009
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