I have two Aqueon, 200 wt. heaters in my 55 gallon tank. They are very reliable, and I love them, EXCEPT when the weather changes. If it's pretty warm, I have to adjust the dials to around 72 on both heaters to keep the tank around 78-80. In winter, I keep the house around 62 degrees at night, as propane is very expensive. In this case, I have to adjust both heaters to around 78 to keep it in that range. I always thought I should just set it to the temp I want, and it would stay that way.
Sometimes if it's pretty warm (we don't turn the A/C on until it reaches 90), I'll notice the heaters will sometimes go on when the tank is already
at 80. It doesn't stay on long, but still... this seems strange. Anyone else have this problem?