retro auto top off


Any one ever make a home made auto top off. Every know and than I think of going and buying a toilet kit and making some kind of auto top.
My sump is just an open glass tank. Plenty of room.
I'm sure someone here has done this.
I'm interested in trying this.


Active Member
It does not get more simpler than mine. It just a 5 gal. acrylic box with an adjustable float valve. The bottom of my ATO sits at the top of my sump, with the float valve in the return chamber. Matches evaporation exactly. A couple pics..,