I house my trio of Tinc metamorphs in a ten gal. We are heading into winter soon, and I want to make sure temps stay as constant as possible. How good do undertank heaters work at regulating temps? I would rather warm the tank that way as oppossed to a red bulb, etc. Being that the Tincs are diurnal, there is no need for an illuminated night time view. Thanks!

JBear