Not sure about the screen but I have a plastic screen that came with my overflow that slides right into the intake of it. I had a shrimp get by before I decided to install it. Its just a piece of plastic screening thats bent in half and inserted into the opening.
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.