eaten away fins not flukes

[onefish1598]

I have been seeing the fins of my fish looking frayed and nipped up. Some have minor damage and others more significant. I removed a longnose butterfly from my main tank to my qt tank because he was down to a stub for a tail and would spend the day backed into the rocks so the cleaner wrasse would stop picking on him(obviously picking some critter off him). I thought flukes and fw diped it and no flukes but I did see small white linear specks in the dip and under my disection scope they look like some kind of copepod or tiny isopod like critter. My question is what could this critter be eating off its fins (even in qt its pectoral fin which was undamaged continued to get eaten away) and what do I treat with to kill them along with their eggs etc. In the past all these fish have been treated with prazi pro, chloriquine and coppersafe at some point or another.

 

[JHemdal]

Welcome to Reef Central (and yes, I know who you are).

One thing else you could try - suspend a bit of smelt in the tank overnight and look at it the next morning, see if you find more of the critters - would help verify that it is a falcultative animal doing this. You might want to try that on the clownfish tank as well....

Jay