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Product Reviews
5493 reviews on 1118 products!

ProductsTemperature ControlHeaters
Marineland Visi-Therm Submersible Heaters
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Product Description:
Marineland Visi-Therm Submersible HeatersVisi-Therm Submersible Heaters from Marineland feature direct-set control, guaranteed durability, and certified accuracy to within one degree. Setting the temperature has never been easier, the easy "click" top dial now features calibrated marks, to confirm your setting from the top, that compliments the traditional side viewing sliding scale. They are the perfect choice for beginners and for longtime hobbyists alike who appreciate the ability to easily see and change temperature settings. The advanced mounting bracket provides three window positions to view the temperature display from multiple angles. No other aquarium heater is so easy to install, so easy to set, and so easy to use on a daily basis. cUL-approved for safe operation in both marine and freshwater aquariums.
Product Specifications:
Visi-Therm 25 - 25 watts
Visi-Therm 50 - 50 watts
Visi-Therm 75 - 75 watts
Visi-Therm 100 - 100 watts
Visi-Therm 150 - 150 watts
Visi-Therm 200 - 200 watts
Visi-Therm 250 - 250 watts
Visi-Therm 300 - 300 watts
Visi-Therm 400 - 400 watts
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User Ratings: (5 reviews)
Overall: 5.20
Value/Cost: 5.00
Effectiveness: 4.80
Quality: 4.60
Ease of use: 6.40
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Found: 5 reviews Page  
oetheous has used this product for .
Overall Rating: 1/10 March 11, 2014
Worked great for 6 months, then came home to tank that was over 90 degress. Thank goodness this heater didn't have any more wattage, it would have totally fried my fish. I recalibrated the red knob lowering it, and tested it, and unplugged it when it went past 84 degrees. This thing is junk now.
Ainevar has used this product for 1-3 Years.
Overall Rating: 10/10 August 18, 2013
"Excellent Heater"
I've had one of these running in my 30 long for over a year and a half now without any issues. I really like the red light that comes on when the heater is running and then shuts off when water is up to temp.
thevein has used this product for 1-3 Years.
Overall Rating: 1/10 June 11, 2013
Update: after calling Marineland, and although I didn't realize that the recall on these heaters ended 6-9 months ago, Marineland customer service was excellent, not only did they allow me to ship the heaters back to them at their cost, but also fully refunded me $165 for 6 failed heaters. For this, I will remain a faithful customer and will use their products.

with having over 25 years in the aquarium hobby, 10 of those years with african cichlids, i have never seen a more poorly made product, i have 4 of these #%$& heaters that have either failed completely or almost fried my fish. They are the 50wt(1), and 200wt(3), they are all being shipped to Marineland(shipping on me)with a scathing letter which will also be emailed that they have lost me as a consumer due to such poor worksmanship. Be careful new hobbyist, these heaters will work initially, but will fail in a 1-2 years and kill a lot of fish.
toolman617 has used this product for 3 Years or More.
Overall Rating: 4/10 March 25, 2013
"Easy to use when it works"
Very easy to set up and use, but I've not had good luck with them. Originally had 2, one went out, got a replacement, and now the replacement and the other original are not working. They supposedly have a lifetime warranty, but I can't even get a response out of their support team. In addition, the silver paint on the exterior of the heater flakes off and floats around in your tank.

If you do pick these up, don't take the temp rating on the heater to be accurate at all. Generally they're off 5-10degF out of the box.
vann59 has used this product for 1-3 Months.
Overall Rating: 10/10 January 4, 2013
"It's simple and it works"
After having trouble with a high tech model heater which didn't work well at all, even after being replaced, I decided to try a simple basic model. I have two of these and they seem to work well, and they are simple to operate.
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