sump qu

i have a 90 gal that has 2 one inch holes
i was going to put one inch bulkheads then 1" to 1/2" ristrictors
the to the sump i would have 2 half inch tubes

then for a return i would use 2 fluval 405s

(the sump is a 20H w/ heaters)

i was thinking about putting a ball valve just in case i need to stop it for anyreason

thanks

the hole is 1"

its to my knowledge that i have to put a bulkhead in it
im guessing that the bulkhead will be connected to a hose
that hose would have to be 1" correct?