adding refugium, comments?

[mark]

Looking for for some feedback to layout of a refugium I'll be adding. Purpose of the ref is for nutrient control from cheato pruning and area for pods.

A 20g refugium will sit above and to the side of sump. Supply (blue) will be from teeing into one of the 2" drains (~500gph) and flow controlled by a valve on the downward leg from the tee. Planning on using the drain rather than the tee I already have on the sump return line as don't want to reduce the flow from the display tank. If detritus becomes a problem could add filter sock.

Within the ref I'll build an internal overflow (coast to coast) box on the upper left side, with a 1" bulkhead. The return line (red) will then feed into the skimmer compartment of the sump or further across to the last baffle compartment before the return pump.

LR, cheato and light will be moved to the ref and crushed coral added.