Hello good people! I am a 14 yr old that has a 75 reef tank (with a sump), I’ve had this tank for almost a month, I have a Mustard tang, a powdered brown, a pair of clownfish, a lawn mower Lenny, a dragon Gobi, a sand sifting starfish, cleaning crew, and a sea urchin,They all have been thriving for the past weeks, I just got the powdered brown and the mustard tang, I added the powdered brown first and he was kinda freaked out on the first day, the next morning he was surfing due to his reflection lol, finally after 2 days he was a tang again. I heard that tangs are very territorial so I got the mustard tang before the powdered brown started marking his territory , they fought the first day pretty bad but seemed to be okay the next morning, they’ve all been thriving but then I stare at my powdered brown and see 3 very little white spots on him, I don’t have a pic at the moment but will be happy to add one tomorrow, I haven’t seen a change in behavior, only that he has been hiding a little more, he has been eating just fine and is still very active, and he didn’t have these white spots until I added the mustard tang. What should I do!!! I know you guys probably think I’m crazy because I have so many fish in there already but i added cycled sand, rocks, sump rocks, and cycled water, from a old tank, and it’s been doing amazing, didn’t even go through a mini cycle. Please help