I added a rabbitfish to my 150 gallon FOWL tank a couple of days ago. I didn't notice it the first day, but the second day I saw it had a pink lump on its mouth. Can someone help me identify it as well as know how to best treat it? my water parameters are 0.0 ammonia, 0.0 nitrite and 0.0 nitrate (just finished cycling my tank and did a 100% water change before adding fish).
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