I just added some ich medication to my tank. The stuff is called "Liquid Super Ick Cure" and is produced by "Aquarium Pharmaceuticals Inc" from PA. I know most ich treatments use malachite green as the active ingredient. The person at the store told me it work but now that I've looked at the label, the only active ingredients mentioned are Benzaldehyde Green and Povidone/Colloid moxture. None of those compounds is a synonym for malachite as far as I know - my knowledge of chemistry is a little rusty but I seem to recall malachite's a copper carbonate derivative, whereas povidone is iodine based, and benzaldehyde is just a pure organic compund... though the green could be caused by a copper oxide component... Sorry, I'll stop rambling. Has anyone used this stuff before and found it to work?