I got a whole bunch of frags and rocks with corals on them. One of the cooler paly rocks I got in that batch had bryopsis i tried to qt in a container for a couple days trying to clear it up but as soon as i put it back in my main tank it grew back so i had to scrape the whole frag palys in all. It broke my heart but would rather do that then loose some of my other pieces. It is a fast and aggressive algae. Be careful.