Chalice help!

[ToshAlexandra]

I recently got a new golden eye red chalice, and it came with a piece of bubble algae on it. While removing it I very stupidly ran a bit of fresh water on it and it did not like this. The area is darkened and I think tissue is receding on edge. Can it recover? Can I help it? Should I be fragging the area that still looks healthy? Feels like a personal epic fail on this one lol think enforce you act!!!