Hi all! New to the forum. I’ve had a pond for a few years (originally for our ducks) and have recently turned it into a koi pond. We had an over abundance of string algae last year which was quite easy to identify but I need help with this one. The fish love hiding in it and it grows all over the floor and walls of the pond. I don’t mind it especially if it’s not bad but is does clog the filter a bit. Should I clear it out or just do some regular tidying of it? Thanks in advance for any help!