Quote:
Originally Posted by
benztech858 http:///forum/thread/383277/building-my-150-gallon-u-shaped-room-divider-tank/60#post_3368892
yannifish, what do you recommend for an auto top-off system?
Well, I personally have a gravity fed one, where a 4 gallon tank sits in about three inches of water, and there is an opening in the bottom (it is air tight on top). When the water level drops below this opening, it allows some air in, releasing some water. Imagine holding a pop bottle filled with water upside down so the top is just under water, it works kind of like that. Moving the unit up and down controls the water level in the return chamber. A pipe connects the ATO to the return chamber. However, I wish I had the type where you have a separate fresh water reservoir, with a dosing type pump between the return chamber and the reservoir. A float valve turns the pump on and off as the water level in the return chamber drops.
Just remember always to top off with fresh water, not salt, as the salt does not evaporate. Also, talk to other people about their ATO systems.