i was wondering if someone give give me a point in the right direction. I have got a small 100ltr Fluval tank tank I want to make into a marine. I don’t want to use a hang on skimmer so am thinking of making some sort of overflow in the corner of the tank and a small sump underneath. The thing is I don’t really want to drill the base of the tank so am wonder what I can do?. I do a lot of plumbing work and can do most thing and I have some black acrylic and would like to make a corner overflow so it’s neat and hidden. Any help and advice would be very greatful.