So I put my new corn in a ten gallon tank. He is small so he still has plenty of room. I got an undertank heater that is about 8" x 8" and placed it under one side of the tank. Temps are about 78 on the substrate above the heater. That seems a bit too low to me. Temps in my house are usually between 70-72 so the cooler side of his tank is about the same. I am thinking the warm side isn't warm enough. What do you think? I have a small heat lamp that has a 50 watt red bulb in it. Thinking I may need to place that over the tank as well. Any advice will be helpful.