I always hear complaints about string algae and how unsightly they are. Well, where you see problem, I see opportunity.
I once read that if you remove all string algae, they will keep on showing in your pond. But if you confine them to a part of it, that´s the only place where they will grow...
With that in mind, one day I decided not to remove string algae, but to use them as substratum to grow... Azolla
It's easy:
Pick some string algae and place them where you want to grow the Azolla
Then "plant" the Azolla
Sit back and watch the algae and Azolla grow...
and grow...
and grow...
and grow...
And, suddenly, the wall is covered, and other plants start to grow... (last year's picture)
And that's the only place where you'll find string algae in my pond...