Small, white circles at the top of my tank?
PostPosted:01 Apr 2021 19:50
Hello everyone! A few days ago, 3-4 small white circles seemed to form at the surface of my tank. Upon removal, they felt quite hard. Today, one more appeared and I’m wondering what it might be. The only things in my tank are Opae Ula, some MTS, macroalgae and a limestone rock. Any possible insight as well as if this should be a concern would be greatly appreciated!