[dekay]

Ppl who use the Prism Pro series skimmers. When you hang it on the back of your tank, does it lay flat on its back against the tank or do you have to tilt it at an angle?

I'm still in the process of setting up my tank, water hasn't even been placed yet. Cuz before I fill it up, I need to know if I need more space between the tank and the wall. Thanks.