I put him in the quarantine tank just now with 1 tsp of salt. The other fish, mainly two who are looking pretty healthy, were chasing it around a lot. Since adding it it's been in the corner mainly. Although i've taken pics, i guess they're too big to attach but i'm trying to find a free zip download or something.

Out of the three fish in the tank now, two are getting some color, eating well and chasing each other a lot. The third is the smallest and has been hiding, breathing heavy, not eating that much and has been heavily chased by the other two.....very similar to the other one. I'm thinking of getting a 10 gallon to take this one out and put the two sick ones in together, would this be a good idea? Any ideas for when i should try to feed the one in there now? I appreciate all the advise, hoping things will turn around.