Florida. Its like summer year round here.typically 3-5 watts per gallon is recommended. Where are you located that you're keeping a tropical tank with no heater?
I would have bought a Jager 50W yesterday if the salesperson at the LFS hadn't recommended a 25W for my aquarium. Unfortunately, they didn't have the 25W Jager. I like the Jager's size (I suspect the size of a heating element is important), the calibration feature, and of course its reputation.First off, I prefer Ebo-Jager-Eheim heaters