building a sump, how much room for skimmer?


New member
I'm building a sump out of a 40gal breeder for my 75 gal tank.

I have not yet selected a skimmer, and I realize I may use several different ones over the life of the sump.

How much room should I leave for the footprint of a protein skimmer for a 75 gal tank, to be on the safe side?

I believe in going big BTW.