Hey all I recently bought a juvenile yellow tang.... Been a part of my tank for approx 3 week but recently notices white spots in body and fins . Prob ich but ive done everything I've read... Cranked the heAt to 84 steady, but refuse to use chemical. I'd hate to lose this guy... He is eating and active just has white spots everywhere... Any help would be good.... just upgraded lights to 4 bulb t5 from pc so maybe that's causing the stress? Thks