I've had a 55 gallon for over a year now and decided to try out a nano, so about a month and a half ago now I started an 8 gallon. I ordered live rock online( first time using live rock) waited about 2 weeks with the help of start smart complete, everything seemed fine so I added a blue damsel and some corals, everything's been going great untill today I noticed this stuff growing and idk what it is. can u guys help? is it bad or okay to leave in? or how do I get ride of it. thank you
