Display fuge bulkhead placement

[Tom Giddens]

I am building a 40 breeder display fuge and I am unsure of bulkhead placement. The display tank is acrylic and I want to place bulkhead in the back of the overflow box but I don't know if I should put it half in half out at the water line or place the opening below the water line? It will be gravity fed out of the display and then gravity fed into the return on my sump.

 

[Pntbll687]

I am building a 40 breeder display fuge and I am unsure of bulkhead placement. The display tank is acrylic and I want to place bulkhead in the back of the overflow box but I don't know if I should put it half in half out at the water line or place the opening below the water line? It will be gravity fed out of the display and then gravity fed into the return on my sump.

You could put it wherever you like. Then just use PVC to put the intake where it needs to be.

Some pics would be good, so we can see what you're planning

 

[JoshH]

When I built my fuge I put it (Slightly) below the water line and used PVC to raise it as high as I could. @Pntbll687 Has it right, it really doesn't matter where you put it as long as your happy with where it is. Then use PVC to get the outlet where you need it. The only real technical advantage to going below the water line is getting the hole drilled for the overflow further away from the edge of the glass making things a little bit stronger.:)

Unless you are specifically referring to the drain from your DT down to your Fuge, in this case you would want it submerged with a gate valve to tune your flow to the Refugium. You can also do what I did with mine and T off the main siphon drain before the gate valve avoiding drilling into your DT all together then just add another gate valve, tune the two to your overflow and your all set. It's a little bit of playing around when tuning but saves drilling into your DT Overflow.