If you need more of the metronidazole, the link that was given in post 4 by @Wyorp Rock is a good place to find it. Here is where to get the correct type of acidified copper sulfate:
https://www.jefferspet.com/products...6bqR-8-t2qs1pq_klJLBqr9exFHOlh3BoCkkkQAvD_BwE
https://www.jefferspet.com/products...6bqR-8-t2qs1pq_klJLBqr9exFHOlh3BoCkkkQAvD_BwE