Marineland Visi-Therm Submersible Aquarium Heater, 300-Watt

from PistolPete

At first the Heater would just continue to heat my tank way past 80. I soon learned through testing that I had to set it at 73 to make it 82-76, yes it has a 6 degree difference in temperature. Com...

from Mike P72

I have used Visi Therm heaters in the past with no problems. As wells many other Marineland products on all 7 of my tanks. But quality control must have been fired because the new ones are horrible...

from Carrcs

I bought this heater a week ago and it doesn't work. Light flashes on and off and most of the time doesn't want to come on..

from Duubler

1st heater overheated tank and Marineland sent out a new one because it had been recalled. They sent this one. It worked great for 12 months and now it won't heat. The light turns on but that's abo...

from dominik_dg

Just bought it last night at Countrymax, set it up and dialed it on 82 degrees, so far water just gets up to 75 degrees, see pictures of my 2 thermometers. Definitely taking it back to the store.