Plumbing questions w/ dual Displays

[OutsideBrian]

I am thinking down the road that I might want to add a display Refugium into my system.
I am currently operating with a 57 gallon Dt and 20L sump. It is setup with a single durso overflow and a Dc return pump.
Part of the idea is to baffle off 5-10 gallons of the Refugium as an Ato reservoir.
How would I go about plumbing in the second display tank?
Any good threads or videos would be appreciated, I searched but could find much.

 

[lolgranny]

T off your main return. Use a gate valve for the Both tanks to get the flow you want. Both drain into where it does now.