Thanks for additional info. By the way what is an IMO??
I have been removing many feet of lily tubers that cover the bottom of the pond. What do lily roots usually look like other than these tubers. Are there usually mates of small feeder roots?? I never really observed them. I have seen regular plants rootbound in a pot. I have now removed about 30 feet of tubers. Whats strange is that I had the pond emptied 2 years ago in the very very early spring and didn't see all these tubers?? Only a few. Thanks again