I definitely don't need one in the summer, as we keep the a/c between 78-80 (sometimes down to 77 at night!), but likely will in the winter, as I don't like to set the heat in the house much higher than 68! Pretty frugal with our temps and I hate the feeling of artificial heat blowing on me. Right now I don't even have the heater plugged in as I felt it was melting some plants that were right up against it. But will need to work something out in the next couple months lol...Living in Texas, I doubt you need a heater in you Aquarium. Most people i know in my area keep their homes in a very narrow temperature range. Switching from heat, a/c and back in single day. I have had several heaters stick over the years. My current aquarium is generally 74 deg.F plus or minus 2 deg. Use City of Houston tap water and do 50% water changes weekly.