Hey guys! So my first frag that's 6 or 7 months old now is my acan and the last few days he hasn't been coming out and I noticed a little white thing coming from it's skeletal structure. Can someone take a look and let me know if I have a problem here ? The rest of my corals are looking great. I've already mixed a 50% water change that I'm doing tomorrow just to be sure. Water parameters are solid. No change in amonia or nitrite.
