I bought this angelfish about a week ago, and I can’t tell if its my paranoia (since the two previous times I’ve attempted to take care of an angelfish in my tank they died within a short time span) but the fins of my angelfish look like a faint white color as if they are deteriorating. I thought it may have been just the lighting but now theres a visable bit hanging off the top end of it as shown in the attached photo. I know the other fish aren’t biting it. I also wanted to note the angelfish hasn’t been acting odd whatsoever. I was just curious if the angelfish’s fin condition was something to be concerned about. Here’s a picture for reference, thanks.