Over flow, sump and a mag 12

L

LikuidMetal

I have a question. I now have a mag 12 for my 75gal. what can i do in the event the overflow box stops running or my pump stops running. Either way it will over flow onto the floor right? what do i do to prevent that?
 
not sure what to do if your overflow stops and gets clogged, I suggest a two drain overflow box?

it shouldn't matter if your pump stops running, fill up water in your sump so that when you disconnect the return pump water fills up just enough of the sump
 
You need to drill some anti-siphon holes in the return line where the water pours back into the tank. Drill at least two holes 1/2" beneath the normal water level in the tank.

Simulate a power outage. Unplug the pump, and make sure the sump can hold all the water that drains down. If you still have room, add more water to the sump. Now restart the pump. When everything is flowing normally 90 seconds later, draw a black line on the outside of the sump where the water height is in the return section of your sump. Now when you top off, you'll no <u>never</u> to add more than that line, because if you do and the pump turns off, the sump <u>will</u> overflow.

There is nothing you can do about your overflow box losing the siphon, besides watching it closely to make sure no air is being trapped in the apex of the tubes (or channel if it is designed like a weir).
 
You can minimize bubble build-up in your overflow by running the venturi airline from a power head up into the top of the U-tube. It will also make it easier to restart the system following a power outage. Then, just make sure the algae is kept under control, and you're about as safe as you can get with that setup.

Later, James.
 
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