Plumbing Question.

[goldfisher]

I have 180g reef tank with dual overflow that I'm converting to a planted tank. I'm on the process of taking out the sump and switching to canister filters and would like to hard plumb the return flow.My canister has 16mm/22mm hose, should I use 3/4" or 1/2" PVC for the return flow? Thanks.

[goldfisher]

Mods:Sorry I double posted this question.I meant to post it in DIY section.You can delete this one.Thanks.