PointGod11

I recently bought and installed (first time custom loop, hardline at that!!!!) the Pacific M360 cooling kit. I want to add my GPU to the loop. I know the radiator is Aluminum, what material is safe to use when looking for a waterblock? The ones I've seen compatible my GPU have warnings NOT to mix with aluminum. BUT I see that with the coolant and the zinc coating it says things like copper should be ok. Just looking for some help. Thanks in advance!