Puffer floating at the top of tank -help

[fishoholic]

Thanks for the info Lee. What little info I did find on the Internet said they would be ok in aggressive fowlr tanks and since he was so healthy looking and eating and had been in QT at AI I took a chance. My eel tried to eat him then the small hawkfish attacked him which stressed him causing him to puff and get a bubble. I had been careful before hand during transfers not to expose him to any air so I was chocked when he puffed and got air into him. Wasn't sure how to get him to release it. Needless to say it's not easy to hold a spikey fish, he did unpuff but never quite got rid of the air in him. I was really upset that I lost him and will not be trying another unless I have a low flow peaceful tank for one.