Hey Graham, absolutely top notch reef you've got. I'll bet you can sit there and watch it forever.
Thank you for taking the time to give so much useful feedback to everyone who has posted. I hope you can do one more.
I have a brown gorgonian. like the one in your tank. I have had mine for about two months now, and last week it closed up completely. It only partially opens now, and only for limited amounts of time. Nothing has changed in the tank recently, water parameters are all perfect, except KH (Carbonate Hardness) is a little low, 6, but within acceptable range. I am buffering to get it back up, and watching my PH as I do. Everything else is at perfect readings. My lighting is three MH 250 watt 6500K, on for 12 hours, two VHO actinics on for 14 hours. All other corals are doing well. There is moderate current where it is located. The gorgonian moves a little, but is not bent over due to excessive water flow.
Any ideas. I attached a picture from your tank just to make sure we are talking aboout the same coral.
Thanks in advance for any thoughts you might have.