hi, i checked the temperature of the water in my tank yesterday, and it was 69 degress F. i know that isnt too cold for most fish, my worry is that in the winter however it will get to cold as we dont really heat the house at all to conserve on gas. im wondering what heater i should get for my 20 gallon tank. i want something that will turn on and off automatically. and i have no idea of what wattage. Thanks!
LT
LT