Hello!
I am about 2 months into a tank startup and used TBS live sand and some TBS live rock in my sump. Display rock is Marco rock and I am currently in the heart of the ugly stage with some brown and green algae. Today I noticed a strange looking bubble thing about 1cm long on the rock near the front. Not sure what it is and hoping for some help!
Thank you!!!

I am about 2 months into a tank startup and used TBS live sand and some TBS live rock in my sump. Display rock is Marco rock and I am currently in the heart of the ugly stage with some brown and green algae. Today I noticed a strange looking bubble thing about 1cm long on the rock near the front. Not sure what it is and hoping for some help!
Thank you!!!


