also i was talking to a guy at my LFS and when i was telling him about my puffers(he is a puffer maniac so he loved the fact i got these guys) he was asking if i started getting the black marks on the puffers, and i have gotten that before but nothing like that too recently, and he informed me that it is lack of salt in the tank and its making them upset. which makes sense because i dont think they have gotten the black on them since i had them at fully marine, but they were getting it while they were still brackish. i will try to sneak some pictures of my puffers so i can post on here