ryangina
Reefing newb
can a hang on over flow box flood a sump if the pump fails to return water to the tank like with a power outage?and whats the difference between a the hang on deal an having a tank with an overflow built in? thanks ryan
ok so with that these o/f boxes are makeing more sence so now if it doesnt overflow the sump when the power goes out will it overflow the tank,does the sifon stop?Bifferwine said:I have an overflow box. It will overflow the sump if you don't set it up right, so after you set it up it's a good idea to do some "practice power outages" and turn everything off to make sure things would be okay in a real-life power outage.
The idea of the overflow box, is that it will only send the amount of water to the sump that is above the lip of the overflow box. Any water below it can't overflow the lip and be syphoned out. You need to have enough empty space (i.e. not filled with water) in your sump so that if the return pump turns off, the overflow box can drain all of the water above it without flooding the sump. So if you put the overflow box too deep in your tank, the sump will not be able to hold all the water above it and will flood. If you put it at the very top of your water column, the unfilled portion of the sump will be able to hold any water above that level. I hope this helps and wasn't too confusing...