Ok I am new here so first off hello everyone, Now to my question. How can I maintain a 75-76 temp in my tank. Right now it goes from 76-77.8 and that is with the heater off. I am having issues with my heater, if I set it at 75 degrees and the tank is internally at 77 the heater turns on. Is there a good heater I can buy that is more accurate? My fish are gouramis(6) 1 dojo,1 farlowella,3 occotinulis (sp). In a 55 gallon tank.