I should try to get a pic of it, it's doing good. Starting to grow more and the polyps are always nice and open. It's encrusting now too. I just noticed that not long ago. I'm sure soon it will be taking over! 
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Fantastic looking build. How's the ATS working out?
Hmmm, IIRC brown slime means not enough light, may be worth trying the higher wattage CFL bulbs and see if you have any luck. Heard some mixed opinions on the UAS but have been very tempted to try one myself. Currently my refugium section of my sump is empty so debating on an ATS or some miracle mud in tupperware trays to make the 50% yearly changes easy and some macro algae. Keep us updated!