- Location
- Dingmans ferry PA
can u use the same size hole for a return and drain.i have a 38mm and a 45mm diamond bit but i was just thinking the 45mm would be to big for my 35 gal.im setting up for my son for a clown anemone tank.since i introduced him to this site he has been bugging me to set my old 35 up into a salt water setup..