I'm getting moderate coralline growth now, so that's a step in the right direction. The tank is in the green algae stage right now and I'm having to wipe the glass every day. Its something I have found typical of tanks 4-6 months old. I'll be looking out for the cyano stage next that seems to happen right after the green algae stage. The rocks are no longer the green you usually see with an immature tank, so that is another sign of progress. Hopefully I don't have to much longer before its mature enough for these swings to settle down and ready to keep sps very happy. The frag of birdnest and maricultured tenius are doing pretty good still. I would probably be ok to stock the sps in there now, but I really don't feel like turning 40 acro into calcium reactor media.