My success with leopards greatly improved when I started using a TB syringe to inject PE mysis with panacur every 3 days for a total of 4 treatments. Before that I had a few that would eat all day long and still waste away. I just inject enough that a small amount can be seen in the mysis. I feel like injecting the meds into the mysis works better than Focus to ensure they are actually ingesting the meds. Doesn’t seem to affect the flavor enough for the wrasses to notice. So far I’ve done this on a couple Choati, blue star, ornate, and black. The only type I’ve lost recently was a couple Potter’s wrasses but those are even tougher than Choati in my opinion. My Potter’s were eating one day and then I never saw them again the next. It’s possible that my gigantea anemones snagged them but they’d be the first fish they killed if that was the case.