I've seen a lot threads where people have problem priming their canister after a service, well i don't know if any one have try this because mine start every time, after a clean the filter put every thing back together back to the tank intake sumerge as well spray bar then take the strainer out and with a power head push water into the canister until you see coming out from the return, start every time don't forget to put you strainer back on rigth away other wise by fish i hope it help some one
