I recently bought a much larger tank for my 10" Golden Marble Pleco, and I was curious if my 3'' Green Spotted Puffer can co-habitate with it. I know puffers are notorious for mauling tank mates, but considering the size of the pleco, would it be problematic?

Note: when I received the puffer fish, it had been a fresh water, and when I tried to create a brackish environment for it ( very slowly over time) it got very ill, until I returned it to fresh water. So I know that as far as environment these two particular fish can co-habitate, I just want to make sure that my to most prized fish will not hurt each other.