My daughters 29gal biocubes residents are having issues. Larger of 2 false perc clowns is staying in a nose down position. She seems to be staying under a big rock formation. She came out when I dropped some flake and I noticed some white spots on her. Not suger but more hazy. Also heavy breathing but no fliking or swimming into powerhead current. Also noticed spots on orchid dottyback. More pimple like.First guess would be brook but would that explain spots on dotty? I have qt setup from previous fishues and have built up some meds. Is coppersafe right path for this? What meds, if any, should I run with? I have moved all fish to qt and wanted to make sure I am on right path. Thanks for any and all advice or suggestions. Her tank is approx 6 months old with no previous problems. Only other fish is a ym goby. She does have a peppermint shrimp but I'm not sure if that could host (troments).(?)

