Is it easy? Can I just use a new holesaw? And can I mess it up? I need to add another outlet for a pump back to my fix'n to be refugium. I have exp. in Lexan and I know it will crack pretty easy.

1 more question. This sump was actually a refugium on this Tank I just got. And It had bio balls. It is actually built like a big wet/dry. I know I dont want to run the Bio balls, but the inlets are on top of this sump and will be extremely loud with no media in that area. Can I place LR rubble in there and be safe? You know, without makeing a Nitrate factory?

Thanks all
Johnny