well its creating Oxygen, its a good thing... the algae on the other hand isnt
The plant (algae both macro and micro) is doing its job, its converting CO2
and growing bigger as a result, it will be good for your tank, it will help your O2
levels go up.
It will help the tank out, However a good skimmer keeps O2
levels in check anyway, so with that said, you should still wipe the algae off your glass before it takes over (and once it does, its hard to get rid of... believe me... I know!)