Bleached and browned out, eh? And I thought it was alive and well. I've had it (and the whole tank) for a little more than a month now. No sudden algae "die offs". Polyps come out to feed almost all the time. I removed several large-ish (1" diameter body), brown-ish crabs that were living in them and appeared to be eating them (as opposed to cleaning them) and a sea urchin that seemed to be on them a wee bit more frequently than I liked. As for water flow, I got a single model 4 Koralia water fan mounted inside the DT; otherwise, main pump circulates the 250 gallon total water volume, including sump, at approx. 1000 gph.
From what I have read, brown is a good color for these guys to be exhibiting. My 9 year old daughter came home from a summer camp type ativity and told me that white means it's dead. The white ones in my tank are most definitely NOT dead. They just need some algae to give them color. There is a small amount of purple showing on several of them. As soon as my camera battery recharges, I'll take some up close photos and post them later tonight so ya'll can give me real info!
I give at least 12 hours actinic light per day (4 39 watt T5's), plus 8 hours of 2 more 39 watt actinic T5's, plus 6 39 watt 10,000 kelvin T5's. As I said, I feed phytoplankton every now and then and let protein skimmer run 24/7 although sometimes I'll turn it off for the night after adding phytoplankton.
I also keep some polyester fill as a mechanical filter. It is great for catching diatoms and other stuff that makes it through the sponges and wet/dry lava rock. Does that also catch whatever these corals are actually eating? Should I remove it?
BTW, at least the phytoplankton the LFS sold me was refrigerated - - - "DT's Live Marine Phytoplankton, Premium Reef Blend." Label says 2-20 microns.