What is the height of that tank - about 24 inches? I dont have any tanks that big or deep, so I cant visualize how bright your tank is with all three lights running. But Java moss and Anubias are low-light plants and dont need much. I keep lights on about 12 hrs to approximate day length in the tropics, and adjust the number or wattage of lights until I get decent plant survival without too much algae. Floating plants (frogbit, salvinia, water sprite, guppy-grass, hornwort) are another good defense against algae, and they're also excellent for absorbing ammonia and nitrate. If your filter is keeping the water surface moving, you may not need the airstone. If the filter return is below the surface and not providing much surface agitation, then I would run the airstone all the time.