Mar 17, 2019 #1 T Tubbsiewubbsie Community Member View Badges Joined Mar 17, 2019 Messages 72 Reaction score 50 What state or country do you live in Illinois Rating - 0% 0 0 0 Can anyone ID this gray stuff. Feels hard to the touch.
Mar 17, 2019 #2 J Jon Fishman Cleveland Ohio, buy/sell local! View Badges Hospitality Award My Tank Thread Joined Feb 18, 2019 Messages 5,105 Reaction score 8,694 Rating - 0% 0 0 0 Probably sponge? #reefsquad
Mar 17, 2019 #3 Bato367 Active Member View Badges My Tank Thread Joined Jan 11, 2019 Messages 338 Reaction score 380 Location western Colorado What state or country do you live in Colorado Rating - 0% 0 0 0 Looks like a species of encrusting (coralline) algae to me.
Mar 17, 2019 #4 OP OP T Tubbsiewubbsie Community Member View Badges Joined Mar 17, 2019 Messages 72 Reaction score 50 What state or country do you live in Illinois Rating - 0% 0 0 0 Thanks for taking a look.
Mar 18, 2019 #5 Peach02 Valuable Member View Badges Reef Tank 365 My Tank Thread Joined Jan 11, 2019 Messages 2,260 Reaction score 2,709 Location Australia What state or country do you live in Australia Rating - 0% 0 0 0 Kinda looks like bubble algae to me I’d try to remove it or put it in quarrntene