How much parrots feather is too much? The plants in my pond have gone crazy this year and the parrots feather has taken over. The water lilies have been getting through in some spots but I have to wonder if I shouldn't thin the parrots feather. On the plus side I think the plants are really clearing the water of excess nutrients because what water I can see is no longer green. Also, all the plants give the fish plenty of cover for hiding from predators. On the down side I can barely see the fish for all the plants and the parrots feather seems to be trying to crawl out of the pond now.