my sixline has been doing just fine until today. it ate this morning then all of the sudden i noticed my once active fish hiding under my live rock breathing heavy he has been there all day .. i took some of my tank water to my fish store to be tested and all was fine, i have a mandrian gobby and a bi color, snails and crabs and a chocolate chip star fish they all seem to be fine. My store sent me home with a power bulb to add more oxygen but nothing has changed.
i just noticed that his lips look chapped..white... what does this mean???!!.. what do i do? I do not want to loose him!! some plz help