black ich or worms

[phk36]

Hi, I have a yellow tang with what I see is black ich or from what I recall some kind of worm. I am in my fourth week of hypo on my whole tank total water of about 250 gallons or so. I know most people use prazi pro for worms. How can you tell if a fish has internal worms ? is there any sign ? Some say to look at there waste is it to be loose or more like a solid ? Thanks Pete

 

[Mrscribbled]

Usually if internal parasites are present, the fish will have white stringy poop. In order to treat black ich you'll need to copper treat in a separate hospital tank. Prozi pro is a safe de wormer but does not have much effect on black ich.