I use Visi-therm stealths...you can have it out of the water w/out a problem. I have never taken mine all the way out of the water while plugged in, but have done water changes (50%) without turning it off. I only have one in my 55g and it heats great. I have not had problems with uneven distribution. Also, if you have a black background, the heater is easier to hide because it kind of blends in (except the red knob ). I like the stealths!
I am not impressed with Hydor heaters. I have one in my 10g and it is set on 71F but the tank is still 80F...have changed with cooler water, reset the heater, and still it is 80F. I will be replacing it soon.
I am not impressed with Hydor heaters. I have one in my 10g and it is set on 71F but the tank is still 80F...have changed with cooler water, reset the heater, and still it is 80F. I will be replacing it soon.