okay. i just had a bottle of this and at $34 for 30ml its pretty pricey. someone gave it to me a while back and i forgot i had it. i'll give it a try next time i see ich and let ya know how it works. its made by a company in canada and the company only has 5 products, but they specialize only in reef stuff. the ingredient is crystalline peroxide salts and the product is supposed to be highly effective against the free swimming as well as other stages.