Might wanna wait a couple of weeks and make sure your tank catches up to the bioload, since saltwater tanks don't catch up as quick as tropical fresh and since you don't know yet exactly how much the puffer usually eats and spits out and how much that will effect it.
I've made a big mistake adding fish too fast before, then before you know it at the least you're dealing with algae problems.
I've made a big mistake adding fish too fast before, then before you know it at the least you're dealing with algae problems.