The bulkheads have those barb fittings already glued in place? Or are they actually part of the bulkhead?
If it were me, I would just buy some new bulkheads if the barb fittings were permanent, they are definitely cheap enough to not buy the ones you want to use.
Just did an SCA 80 rimless cube(34x24x24), its my first "real" tank with a sump and actual plumbing. lol
Following along, and good luck
