@Mmiller2001, I posted a question to Cory two livestreams ago about how much wattage I should have for my tank - 76 degrees, hundred gallons, house gets into the high 50 degree range in the winter. He said 100 watts should do it with the tank covered. I am interested in the heater you recommended, with the Inkbird controller. I think I will start with a single 100 watt heater and see how the tank does - I can have another 100 watt heater on hand and can add it in the winter if the tank is not maintaining temperature. Since the controller is external to the heating element, do you think flow around the heater is an issue? My tank will be what I will call low to medium flow. By the way, I looked at your journal - beautiful tanks! Love the planting!