What kind of algae is this?
This is in my 40g. I have the regular Nicrew lights and leave them on for 7 hrs a day and I don't dose any ferts as the tank I transferred the swords from only ever needed root tabs. Seems like it's only on the leaves closest to the light. The little appendages are not only on the edges of the leaves but the surface of them as well.
There doesn't seem to be a color to it, almost kind of clear. You can't see it unless you put your face to the glass. Anything I can do to lessen the growth? Cut lights down, some type of shrimp I can add, floating plants? Let me know.