Hi, I have been having a problem with keeping my tank in the 75-80 degree ferienheit range. So fare I've got a electric heat pad, it works fine and keeps the tank in the 75-80 range when left on the bottom but the problem is that the bottom gets really hot and damages the new growth that's coming out. So I removed it and left it on the side of the tank but the temps always stays in the 70's, what do you guys do to heat your tank?