Great! Thank you for the advice. We are moving 4 of our bettas into a new tank today, so we will have 4 tanks to work with. I already have a heater in the tank with the goldfish and have started raising the temp. Its pretty hot here in Florida this time of year so the tank hovers around 77 right now. Takes a lot of energy to keep the house cool when its in the mid to upper 90's and the heat index and humidity is outrageous. I think humidity lately hasn't gotten below 80% in weeks.