custom acrylic tank

[purplepolypeater]

untamed you seem to have some neat ideas could you sketch up something showing what you are talking about maybe what would you do with the return pump if not in the middle.

[brizzo]

Originally Posted by purplepolypeater

untamed you seem to have some neat ideas could you sketch up something showing what you are talking about maybe what would you do with the return pump if not in the middle.

If your return line is coming from your sump, and not a closed loop, remember that the tank will drain down to that point, or even lower if you have loc-line (creates a siphon from your tank to sump). You can use a check valve to avoid that, but people say they can be faulty and require monthly inspection.

If you go with a center external overflow, your return can go in corner near the top, drill a small holes in the loc-line to prevent a siphon from starting. Works like a charm

You could also go up and over the back for a return, but more elbows means more head loss (marginal).

[untamed]

Originally Posted by nazerine

You could also go up and over the back for a return, but more elbows means more head loss (marginal).

Yup....that's what I would do rather than have that hole in the center of the back wall.