I think my clown knife may have parasites. He is acting like he cant breathe and is scratching his body against everything in the tank. I have an air pump in the water and a filter that is more than efficient. The tank also has a fishey smell which didnt happen untill yesterday. Now I did just change 20% of the water and the carbon filter. I have other fish in there and they dont seem to be effected. Water peramiters are normal. ph of 7, no nitrates or amonia. Is it just me or does this not make sense?
