Natural Algae Control
Hello again M...
Nice tank. The algae is a natural thing and a sign you're maintaining a healthy tank. From the pics, the algae isn't that bad. I read your later post and there's a good amount of food dissolved in the tank water from the root tabs, Excel, etc. That food and you have smaller tank with not much water to dilute dissolved nutrients, will make an ideal environment for the algae.
I was told to dose fertlizers only when they were removed through the weekly water change. If you dose them more often, then there may be more than the plants can use, so algae will take advantage.
I don't believe the plants will notice if you only dose the ferts according to the instructions and only dose after a water change. The algae, on the other hand, may shrink due to lack of food.
"Fear not my child, just change the tank water."