You may be confused because you are relying on the temperature indicated on the heater adjusting knob. These markings are NEVER to be trusted. The only way I set the temperature in a tank is to play with the knob until the heater maintains the temperature where I want it. When the temp went to 75 and stayed, that's right exactly where I would have left it. I would not have touched a thing.
Here is how I do it. I start with turning the knob down to where the light goes off. Then I very slowly turn the knob up until the light just goes on. Then if the tank is already where I want it, I turn the knob ever so slightly back until the light goes off. Then I let it sit and wait to see how far the temp drops over the next few hours or even a day. Then if it drops too far I turn the knob until the light goes on and then wait again for the light to go off and to see if the temp is where I want it. (75 is where I almost always want it. This makes it so the heater turns on at 75 but with lights and pumps it has more wiggle room. By starting at 75, it takes longer for the tank to heat up to over 82, the danger zone.) It's a slow process but that's the only way to do it. The slightest turn of the knob is not going to corresspond with the actual change so be patient.
Actually, just one 250W is plenty for that size of tank.
Ebo Jeager makes some of the best heaters, IMO.
The most common problem with heaters is that they stick in the "On" position. Many people will use two lower wattage heaters so that if one breaks and sticks in the "On" position, it will not fry the tank!
I have also used the "Stealth" heater. It has two safety measures; made of unbreakable polymer/ceramic and a cut off switch in case of overheating when out of the water and still plugged in!
Topic Options
Post Options
Thanks(0)
