I have a 45 long that is going to be a FOWLR so I don't care as much about light getting through. I want it to hold a snowflake eel and some other fish. I have a huge HOB protein skimmer that makes covering the tank a biotch. So I was thinking of using some kind of netting or screen, but I figured the screen would rust. I don't want to use egg crate because I think the eel would find a way to escape. Any thoughts of what I may be able to use?