Apr 13, 2020 #1 sergifed91 Valuable Member View Badges My Tank Thread Joined Apr 3, 2018 Messages 1,630 Reaction score 476 Location Iowa Rating - 0% 0 0 0 I don't know what this white stuff is on some of my rocks? Sponges? Bubble algea?
Apr 13, 2020 #2 fishguy242 Cronies..... INSERT BUILD THREAD BADGE HERE !! View Badges Partner Member 2024 Reef Tank 365 Photo of the Month Hospitality Award Midwest Reefer Fish Medic R2R Secret Santa 2023 FIREBUG Joined Jan 21, 2020 Messages 46,975 Reaction score 276,159 Location Illinois Rating - 100% 1 0 0 hi ,sponge,good filtration,happy reefing