Man every city in Canada has a hydro store. Most will ship whatever u need to you. I have used and reccomend jons plant factory burnaby bc. Or tt hydroponics in Edmonton. Wherever u live in Canada, a hydro store is close
I order all my stuff off amazon so no cops can follow me home from the hydro store. They love to catch growers that way stupid pigs.
Looking online is a good idea, particularly when hydroponics store employees these days don't know much about growing marijuana.
There are many hydro stores in every province of Canada, check your local yellow pages. Try hydroshop for online ordering. A simple google search will help.