Years ago, our club's president handed me a coral dip sample from Fauna Marin. Turned out to be gold in a vial but I couldn't get more of it. I remember it working so well, but I figured it must have been a one-time thing that picked up zero traction and never made it to market. Fast forward a decade or more, I stumbled upon one of those vials in my massive aquarium-related stash of things. I was in cleaning-mode and threw out a lot of stuff that I'd been hoarding far too long, due to my "what if I need this some day?" mentality.