We have this page on our site about How to Install Natural Swimming Pools and Ponds, but we don't do installs oursleves unfortunately, so we don't have the expertise to determine which species of plants may be causing the problem or which species may alleviate it. Can you tell us where you are located? With that info we may be able to find a more local representative that may be able to answer your questions or even perform the work as necessary.
We have this page on our site about How to Install Natural Swimming Pools and Ponds, but we don't do installs oursleves unfortunately, so we don't have the expertise to determine which species of plants may be causing the problem or which species may alleviate it. Can you tell us where you are located? With that info we may be able to find a more local representative that may be able to answer your questions or even perform the work as necessary.