I'm considering changing out my tetra submersible heater for this one http://www.amazon.com/gp/product/B0006JLPG8?colid=2G7LO0UH7HMVC&coliid=I175PTAYVLUUTY&psc=1&ref_=wl_it_dp_o_pC_nS_ttl I don't really trust that my heater is doing it's job. Is it supposed to reset itself every single time I...

I bought my male betta fish yesterday from petco. He's a delta tail male. Currently, I have him in a 1.5 gallon square tank. Currently, the tank is 72 degrees. I'm not sure if that's a good temperature for him, but I want him to be comfortable...What is the best heater for him? I also currently...