Engineers - Drilled hole question. Physics ?

[MadMan-JaMeS]

only trouble your gonna have is how quickly those holes fill with algae/detritus. Like i said i used to use knitting mesh as filter screens, it has tiny holes but handled loads of flow (gradually reducing as it blocked up). Assuming This is a marine tank are you Not factoring A Skimmer in somewhere?

Freshwater.

in the first chamber i plan on putting 3 lots of sponge to filter out any rubbish. Fine,medium and course. So in theory nothing should get through