As far as quick fixes... I highly discourage tham as there will nearly always be side effects. With lighting, the feather dusters are filter feeders... light is of no issue. The shrooms(an example of a lower-light coral) may not be too happy and may even be lost, but in the long run, your tank should benefit. Syphoning out the brown algea may help, but may return as fast as you're done. Like I mentioned earlier, it's a part of the cycling process. I recommend not using bio bags long term, but for now, it may be ok. Anything like floss or bio-balls with biological filtration tends to lead to acting as a nitrate factory which is a downside in reefing. Instead, try mesh floss bags and again, impliment the use of a sump/refugium with a skimmer. As far as light, I recommend not to use any for the next 6 weeks or so and just let everything cycle. When you feel it's time to begin using lighting again start slowly(about an hour or so per day for the first week with an additional hour each consecutive week until you reach your desired lighting period. When you do turn your light on, make sure they are of the proper kelvin rating or you may just induce a major algea bloom. As far as corals, there are far too many to list... google low-light corals and research the many that you find until you find the ones you like, then ask your questions of those. Your current lighting may be fine, so long as the corals you like are to too light needy.

Jason