I filled the tank up with water, still needs a bit more water. Going to get some guppies and use this tank as a qt for the last time then think about what really to stock it. My heater is a hang on back style and an inch or so is in the gravel, is this okay?
That plate up above is the damper. They are notorious for leakage of warm air out of the house and drafts coming down. It would be best to stuff some insulation op there to minimize it.
Very cool idea. The heater should not be in the gravel though.
And to think I recently took out a wood burning fireplace in my house because we never used it. I wish I saw this first!