Mar 5, 2026 #1 O ourfirsttank New Member View Badges Joined Mar 24, 2025 Messages 21 Reaction score 10 Location USA Rating - 0% 0 0 0 I have a brown spot on my chalice as seen in the photo. I removed it previously with tweezers, but it has come back. What is it and should I be concerned? Thanks
I have a brown spot on my chalice as seen in the photo. I removed it previously with tweezers, but it has come back. What is it and should I be concerned? Thanks
Mar 6, 2026 #2 Gumbies R Us God, Bouldering, and Reefing View Badges Staff member Super Moderator Ultimate Member Reef Squad Reef Squad Leader Partner Member 2026 Excellence Award RGB R2R Secret Santa 2024 R2R App User Secret Santa Database Team Article Contributor Hospitality Award RASOC Member ThreadAward My Aquarium Showcase Joined Nov 10, 2022 Messages 28,944 Reaction score 51,298 Location North Georgia Rating - 0% 0 0 0 @VintageReefer
Mar 6, 2026 #3 VintageReefer 10K Club member View Badges Excellence Award Photo of the Month R2R App User Hospitality Award Joined Nov 16, 2023 Messages 19,170 Reaction score 34,122 Location USA Rating - 100% 3 0 0 I have same issue on one and no solution. Algae grows there. I remove and it comes back