Anubias are beautiful and java looks and works great in low light with moss. The surface looks dead still. Do you have any splash or bubbles to break it up. That fish may not need the O2 or CO2 but the plants do. It would help with algae too.
the surface moves around some and the outflow makes some bubbles I can watch them rise from the bottom of the tank below where the outflow is but may be its not enough. I can move the filter sponge thats baffeling the outflow up some and give it a little more splash