I had Dino's in my 75 reef. It was stringy and brown with bubbles within the snot,classic case. I battled it for a while and it pissed me off because daily I had to blow off my corals with the turkey baster, especially my birds nest because the snot would get so long it eventually dislodged itself, float around and catch the sps and tips. This eventually will cause die back to a extent but you have to stay on it to save the precious coral. What I'd did to address it was fist test my water for problems, imbalance, my rodi checked out fine, the next was parameters. I use API till this day, reagents go bad for a fact my nitrates tested fine with my API and the other parameters where in check as well but not being convinced I took my water sample to the LFS and sure as snot my nitrates were in the red sky high.... With Dino's a lot of reefs tend to agree that water changes are not the answer and can exasperate the problem but with out doing the research and seeing this issue with water changes, I proceeded to do massive water changes to correct the problem. My nitrates were 100+ ppm so I wanted to attempt to cut the number in half , I did a 30gallon water change and it brought the number down by almost half. I countinued during the next couple weeks with the same method to bring it down eventually to 5ppm and was satisfied and out of money and still with Dino's . My solutions was complete lights out. I rapped the tank all the way around with bankets and the top was basically covered by the light. I had to do this multiple times with short brake in between to give the coral some light (sps dominant they all browned out)and eventually the Dino's halted. I shorted my light cycle a couple of hours and maintained better water quality and it worked. The corals came back with magnificent colors as well from reducing the nitrates.
