well its creating Oxygen, its a good thing... the algae on the other hand isnt

lol
The plant (algae both macro and micro) is doing its job, its converting
CO2 into
O2 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!)