|
Have the guy practice on a 3/8" thick pane of glass before drilling your tank if you're worried. I did a calfo overflow on my 120g I used two seperate overflows...one for the refugium section..the other for the sump. I use 1.5" CPVC T's simply snug fitted into the threaded bulkheads. The suction holds them there and snails don't bother it. I've placed small pieces of gutter-guard in the T's to screen stupid fish or inverts. The reason for the description is that if allowed I would shorten my boxes to 3 - 3 1/4" out from the back of the tank as the T's don't require any "outward" clearance to set in place. My box is the standard 4x4" out. I eliminate all noise by placing the T's on their side and by incorporating an durso-style aspirating tube into the plumbing as it drops below the display, feeding the sump and refugium. The only other neat thing is that I also used greyed or smoked glass and sch80 PVC to make the unit visually obscure.
|