Natural Algae Control
Hello again M...
Some other natural ways of controlling forms of algae occurred to me. You may be interested in one or two of them. I've read about Siamese algae eaters, Otoconclus (Otos). Apparently, algae is a diet staple for these fish. Amano shrimp are said to be good and they don't harm plants. My favs, the Ramshorn snails. If you prefer "Livebearing" fish that like algae, then Mollies might work well. I believe Rosy Barbs are best algae eaters among egg layers.
Just a couple more thoughts.
"Fear not my child, just change the tank water."