@help

This is the first time ive seen it in my tank its just wondering the top of the glass near where the water ands

Hi guys. Hoping someone can help me. Recently my fire fish has been un well, his belly has swollen up, he's not eat very much and his swimming has resoted to staying at the bottom and is breathing heavy. My clowns are perfectly fine and so are my corals. Water parameters are all spot on too. I'm...

Hello friends Who sell in USA tropic marin carbon?