Originally Posted by cmor1701d
If the heater is going on when the temperature above the setting you need to lower the setting. If it stll happens then the heater is bad and needs to be replaced. Heaters are always off from their settings, but they should never come on once the water is above high point as measure by a thermometer (not the built in one in the heater).
I tried lowering the setting, but then the tank drops too cold when the lights are off. Right now When the lights are off, the tank sits at 78.6, but then the MH
's are on, the tank temp will get to between 81-83 degrees by the end of the MH
cycle (10 Hours).
I have seen the heater come on when the thermometer is reading 80 degrees. I have some aquarium clip on fans on order, I am going to see what happens once I get those in place. I would like to keep the tank between 78-80 degrees, with out going over, or droping under. If the fan's don't do it, I'm going to try a new heater.
You guys have any experience with those titanium heaters? I like how they are externally adjustable, since my heater will be in my sump once stabilized.