GrandeGixxer & Hopeful Reefer -
I don't understand yoru reply...but maybe I wasn't really explaining things too well.
1" drain will be in the back glass pane, and be IN the overflow box I'll make out of acrylic; there will be a return split into two 1" returns that would come back into the display tank over the edges...maybe one over the front & one over the back. So this would be turbulence near top of water column.
For the closed loop, was planning on drilling 3 holes for 3/4" bulkheads or spa-type jets for the middle/lower water column turbulence, spaced equally across the back pane of glass. The middle one would be the drain into the closed loop pump, and the other two be returns into the display tank.
Planning to use spa-flex tubing for everything...also the unions & valves, etc pictured in prior posts.
Any opinions then on the number or size of drains/returns, and, placement of drain/returns to main sump in combo with closed loop at about 1/2 point of the back of the tank?
Two sides are viewable, and two sides are facing the rear fishroom so I may change this a little to have two rear facing panes of glass drilled with all these holes...in order to space them most evenly.
Thanks in advance for the inputs on this...don't want to change my mind after I've drilled the holes!!
