I have been using this in my fish tank for a while, I will be shocked if anyone knows what this is, have you ever heard of “silver”? Like, the stuff you drink for your health???? I was using it for my betta (Sonic) and I thnk it helped, I looked it up, 100% safe for pet fish, can help with a lot of things. I wanted to tell everybody about it, so if you’re fish is sick, give it a try! I use a measuring cup like for medicine and use 5 ml for it, but anyway, just wanted to tell everyone, if you want to try it!!!