i kept a powder blue in a qt tank for 8 days it was covered in ick.i treated it in rid ick . there are no visible signs of ick on his body or fins.i am confused on how long he should stay in there. some lfs say i week some say 2 weeks other websites say 1 month.the directions say 3days longer when no signs of ick are present on the fish. there even seems to be some confusion on the life cycle on ick between websites and fish stores they very significantly on the length of time. any ideas thanks