Debs, it's very likely as Ash & Dr. Barb previously explained this his curved spine is caused by an illness. If this was caused by a deformity... this nearly always shows up from when they're fry - not very often suddenly - unless caused by an illness. We hope this is a bacterial strain that can be treated with the antibiotics. If it's viral or fish TB... there are no meds to treat these.

In order to return him to the community one day... his spine should not be curved, and he should be showing no other signs of illness - have a healthy appetite, normal activity level and no other visible signs of illness that he may or may not have been showing previously. And he should be symptom free for 2 weeks prior so that your community fish will be safer from being infected if he was returned to the community too soon.

Michele