I was really wanting to know how much damage just one carp would do if I added it.

Obviously if it likes the vegetation that was in there then I guess it would not help at all, but if it is by chance a favorite food, would just 1 fish wipe it out?

Since I like to fish I hate weeds as they are a pain to cast through, but I also know they are good for the BG and others to hide in.

I have read many stories on here that people regret putting them in after they clean up the pond and do not want that experience.

On the other hand if the weeds are too thick then I can't fish anyway.

Seems like a double edged sword to me.