Posted: Tue Jul 26, 2005 4:38 pm
Guides for wattage I've seen recommend 3-5 watts per gallon of water. I use 5 watts per gallon as a calculation. Make sure the heater is fully submersible.
A bigger heater isn't bad, it just may be overkill, but then again the heater can be used longer as the tank is up graded. A heater with a wattage that's too low has to work harder to keep the water warm and may not last as long.
Get a heater with an adjustable thermostat. The pre-set heaters are cheaper, but you won't be able to adjust the temp. It's also good to compare the temp that the heater's set at with the water temp using a thermometer-- the heater setting can be inaccurate and there can be some pretty significant differences between the two.
"You become responsible, forever, for what you have tamed." -Antoine de Saint Exupery-