Hello, I have a 2 month old reef tank, 90g Tall, 12g Fug, 30g Sump,w/Skimmer. DT has 75 lbs LR and 4"DSB. My 5" Scribbled Rabbitfish has small, perfectly formed opaque circles showing up over the past week.... the first one I noticed at dusk and it was about .5mm located on his side. The next...