i have set my pond up so the top bowl of it is just full of parrot's feather to strain the fish goop from bottom. it works for me and keeps my "big" bottom pond clean and clear. so, i discovered that parrot's feather has the daintiest blooms. if they are left in the muck long enough
here you go! sorry the pic is so bad, the bloom is all but spent, i've been meaning to take the picture for over 2 weeks, just remembered today.