W/ proper water conditions and still no behavior changes and/or symptoms, it is better to wait until more info are obtained/shown than upsetting unknown who knows what. I would let it be. Dont disturb it anymore than you really have to. I am sure all are wishing speedy recovery but no drastic changes, especially water conditions via drastic/massive wc in s/w. Coming from experiences of keeping FA & other salties, not from books. BTW, do you happened to know how long lfs had it before you purchased? Tetra Kit is as good as API if not better/accurate. Have used both but easier to use API, imo. When have LR + tank is properly cycled and maintained, it would take lot to go thru MINI-Cycle in S/W which will be revealed with testing. Besides who will add as many fish in one shot as one would do in f/w except Iand some others who has been doing for awhile. I still add more than what others will say it is crazy but no problem when one understand their own S/W tank. Wouldnt recommend though! Wishing speedy recovery!