The brown algae problem now seems squarely under control.  The lights are on for only 8 hours at a time and I've dropped in 6 large turbo grazers.  Combine that with the phosphate magnet I threw in the sump and the water is looking more clear than the day I set it up.  Only problem is that the snails have zero concern for the coral and tend to knock my brain coral and some other pretty thing I got from Mark to the ground on a regular basis - small price to pay right now for having the tank looking good.

Of particular note ... I measured the phosphate levels the other day and they are still really high - over 1.0.  I'm going to measure again tomorrow and see if I've crossed some threshold and they've come down, but I think I'm still struggling to get the phosphates down - even after a number of water changes.