i have a 10g tank with 2 adult platies, and 6 platy frys, what should the temps be for it? and what kind of heaters are good? also whats the best kind of thermometer to use?
Place your thermometer on the far end from your heater. That way you're getting a true tank reading. If you want your heater to heat the tank evenly, placing it under the filter outlet is a good idea.