Durso to Herbie…Newbie

[ImperialWookie]

Back again with another question. I recently acquired an 80 gallon shallow reef tank that is running with a corner overflow and plumbed via the durso method. I’m looking to change it over to herbie. There are 2 drilled holes, one for the return and one for the sump pump. So what I’m wanting to do is use these 2 drilled holes for the main pump and emergency, and then route the return up and over the back of the tank. I’ve never worked with plumbing before so any help would be great!

 

[ImperialWookie]

A few clarifying points. The tank is up and running but no live stock. The PVC is 1-1/4 inch going to the sump and then the return PVC is 3/4 inch. Sump is an eshopps with 2 holes, I’m currently just using one with the durso setup