Help please! Is this normal?

[artrye]

Hello everyone, I need a little help with my Anemone. Up until a couple days ago, he has been eating (silver sides)and very happy (alive and big). Last night he was completely closed for a few hours. When i got home, this is how he looked... any info or input would be greatly appreciated.



PH is at 8.2
Amm. is at 0
Nitrite is at 0
Salinity 1.023
KH is @ ~200ppm
Alk is @ 4.5 mEq/L

33 Gallon, 30lbs of LR, 15lbs LS, 4 Perc Clowns, Yellow Tang, Blue Tang, Dragon Goby, Sand Sifting Starfish, Emerald Crab, Many Blue Legged Hermits