You can buy a different tank later, like a HPA one, yeah - It's not going to mess up the marker if you use Co2 and then High Pressure Air afterwards, no.Ahh, ok.
Can I just buy a different tank? Or will it mess up the marker?
HPA is just far more effecient and easier on the internals of the marker (More places to get your tank filled, too). If you get a Co2 tank, you'll only end up replacing it eventually
I'd imagine not a lot of people would agree with this, but
Mike from TechPB raises a lot of good points in that video on how to (and in what order) to buy your gear