My GSP's are currently closed and have been like that for the past two days. I have a feeling they are in trouble. Last Wednesday, I noticed that only half of them were open. They remained like that (half open/half closed), until Sunday when they did not open at all. I have run some tests and the results were normal:
nitrate: less than 5 (unreadable)
phos: less than 0.05 (unreadable)
ph: 8.2 (does the daily fluctuation, starts at around 7.9 then levels off at 8.2 at lights out)
salinity: 1.026 on the refract
All my other corals are open and happy. I have started running some carbon in a reactor to see if maybe there is something in the water that may be upsetting them but I wasn't sure if there is another possible explanation.