I just set up my first aquarium with a 10 gal starter kit and a Tetra (h10 I think?) heater as recommended by the guy at my lfs. the heater is an automatic one with out an option to change the temperature. I'd like to get another heater as I read that I should increase the heat to help the nitrogen cycle. the heater that is in the tank right now keeps it at a constant 76 F. can anyone recommend a heater that I can adjust? also, I was thinking of getting one that would also work in a 20 or 26 gal since I will be eventually upgrading. would a heater that's big enough for a 26 gal be way too much for a 10 gal? I'm looking for something inexpensive but quality. I would rather pay more than get low quality. All opinions and suggestions welcome
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