Got a F8 puffer from my LFS a few days ago. Came in with some fin nips and damage to his back and sides from being shipped with 6 other puffers. Am treating with melafix for the fins and wounds. Today I noticed about 6-8 white spots on his back and am thinking it may be ich. I have began to convert to brackish water as the puffer was sold to me as freshwater. The water salinity is 1.002 and temp is at 79 degrees. I have IchX on hand, is this safe for the puffer or is there an alternative route I should go. Puffer is eating well and tends to glass surf but has calmed down on the surfing. Any help is much appreciated, thank you!