I'm looking for one for my 2.5 gallon. Do you think this heater would work? All I'm finding are heaters set for 78, and that would be a tad warm for shrimp. But I don't want the tank to get too cold for some of the plants I want. Ideally, I'd like to find one that keeps it around 75-76. Our house remains cool in the winter, so I'm worried about things getting chilled. Probably wouldn't need it in summer. Thanks!