First one, more like what he had, but there was definately no ammonia and still isnt, could have been ph, but ive had fish from 6ish acclimatised up to 7.8 with no problems at all, maybe this guy was just stressed from the move and more vulnerable then?
The outer rim or edge of the gill seem to be pale, frayed or white.
If you look at the gills and they are nice and steak red but the outer "crescent moon" edge of the gill is pale or white, then something has "burned" the gills. Lots of retailers perform potassium dips on the fish before shipping. Formalin dips, a crashed pH, Ammonia burns and nitrite accumulations and more can cause caustic burns to the gill. A white edge to the gills is NOT a diagnosis of bacterial gill disease. Usually these fish DON'T need medications inasmuch as they need water testing, cool clear water, and time to heal from the burn.