I've never had puffers but my jump from freshwater to SW
was very eye opening. You have to do a lot of research, some more research and then a little more. Come back with questions and then read some more.
Having said that I love my SW
tank. It is a more work, a lot of details, more involved and more expensive. I love all that though...except the more expensive. With proper reading and patience there is no reason not to be successful. There are some great articles on this forum. Make a cup of coffee and dig in...