[fishytime]

Originally Posted by nlreefguy

I have never had a problem with a HOB overflow - just put your main pump on a float switch in the display tank such that when the level in the main tank gets too high, it cuts out the main pump. Sure you'll have no circulation through your sump when this happens but at least your floor will stay dry while you figure out what happened.

Im glad you've never had a problem.....but imo a float valve in my display would be less than attractive and mechanical float valves in saltwater are an accident waiting to happen.....

or..........you could just drill the tank with a herbie or bean overflow and not have to worry about aqualifters failing, siphons breaking, floats valves sticking, noisy overflows, ugly HOB overflow hanging on the tank etc etc etc....