Would this compact auto top off system work well?>

[X-Treme]

The carboy sits on the floor right beside my tank and pumps up to the tank (no sump), so from bottom of carboy to top of tank is about 4 feet. NO PROBLEMS whatsoever getting the water to move that far. When I re-fill the carboy, I must remove the top up line from in the tank because of gravity syphon. And when I turn the pump on the water starts to move out of the carboy immediately. When it's empty and I pull the stopper out to refill there is QUITE a pressure build up. The whole setup actually works QUITE well if I do say so myself.

I almost forgot....... YOU MUST PUT A CHECK VALVE IN THE AIR LINE TO THE CARBOY, so that the water doesn't syphon back down the hose from the tank.