and, additional spec: I've had this tank for a year and a half, it's fully cycled. This particular platy was born in the tank and is 10 months old and has had no health problems til now.
My new (as of 3 weeks ago) guppy started getting emaciated and swimming funny. Too late, I figured out it was the camallanus worm (unmistakable- he had the red spider-like worms peeking out of his anal vent). I did a lot of thorough online research and ordered Levamisole from Subquaria to treat...