30 Gallon reef cube build 100% DIY

[Tigweldpro]

Hello, I'm new here. I am currently building a 30 gallon cube reef tank with 15 gallon sump.

All I currently have is a stack of cut glass(free) 3/8" sides 1/2" bottom
I have been looking all over for 3/4" pvc slip x slip bulkhead fittings in Calgary and cannot find anywhere. Anyone know where these can be found?

Plans are 19" cube tank, 3/4" bean animal overflow box, 15 gallon sump, Sicce 2.0 return pump, SCA 301 skimmer, Purple dry rock, dry sand, Lighting LED TBD....

Any advice or help would be awesome