Hello all! I recently purchased a new male betta, and am currently working to get him set up properly. I ordered a 5 gallon tank online and it will be getting here any day now, so I was wondering about a heater for him. I understand it is a necessity, and I want to ensure I get a good one because I know a malfunction could be horrible for my boy. What is a good, reliable heater that will keep him at a steady 80 degrees even though the temperature in my room tends to vary? Thanks in advance for your help!!!