Originally Posted by Aquaman99
their the ones, have a look in my profile there's a load of photo's there,
basically you fix the two boxes together using the nylon bolts,the u tube fits into both,the black box sits in your tank and you adjust the height so the cut outs are about 5-10mm below the water surface,the clear box is connected via a pvc
pipe down and into your sump or refugium(I would suggest a sump),your sump should house bio balls,skimmer,heater,return pump and seperate section with live sand and a macro algae like chaeto,then the return pump pumps the water back to your tank.
If you have a power failure the water will only drain down to the bottom of the cut outs but the u tube will still be full,once power is restored water flows through the cut outs and flow returns through the u tube and down to your sump.
Hope this helps