My goldfish suffered some kind of incident that snapped her fin last night. It's very close to the base, and about five rays are snapped, more than half the fin. It goes upward at a 90° angle and flops down about 10-15°. I want to try and stop the tear from worsening and save as much of the fin as I can, as it started with only one ray broken and her using it made it worse. I have been told that medical grade waterproof super glue would work, but I have no idea where to find it, what brand works, or even how to apply it. I can't find any videos or guides on how to do this.