I was looking for plants recently to add around my pond and came across a list of plants/flowers that are toxic to fish/koi and it was FIVE pages long! My neighbor has five bottlebrush lined up along our wrought iron fence line and are a few feet from my pond. There is no way I can win the battle of trying to pick them up when they fall becaue there are just too many of the flowers. Is this really something I need to worry about and would they even eat a bottlebrush flower to begin with?