My New 72"x20"x20" Tank Build

[GreenSpottedPuffer]

Originally Posted by mark

For the overflow glass, just take the corner off where it goes to the tank silicone.

Not to open this all up again but pls clarify, going from your drawing (and being your primary drain is blue and other that's above the 'n' in return is the emergency).

-You'll have a single gate valve just below the bulkhead and above the Tee to control the flow to the primary Herbie drain.

-A ball valve (as course adjustment okay) on the right leg after the Tee over towards the ref to control how much actually splits into the refugium (other leg, goes left dumping unrestricted to sump).

-The emergency drain line dumps, if needed, directly to the sump.

Yes, thats exactly the plan.

The main drain will be adjusted by the gate valve to get the right flow to match the return pump. The return is split with a "T" though to direct some flow to the refugium on the right and the bulk of the flow to the sump on the left. The refugium flow is controlled by a ball valve. The return pump is being run externally right between the fuge and sump.

Now what Im struggling with is how to connect the refugium back to the sump. I originally was going to have a bulkhead near the top and let water gravity feed back to the sump through 2" plumbing but that would cause all kinds of bubbles that I do not want. So, Untamed had the idea of adding a second herbie to the connection between the fuge and sump which is a great idea BUT I think the fuge is not elevated enough and I don't see how the herbie would work there...but I am not sure of that. Next I thought I would keep the fuge and sump basically level with each other and connect them at the bottom with 2" bulkheads. Only problem here, is controlling flow between them and making sure the fuge is flowing into the sump properly.

Any help would be great because Im just sitting here staring at it with no idea right now how to proceed. I was hoping to finish the plumbing today.