Ok guys im having issues with my zoas and shrums that seem not to want to open up...the zoas only show just a little bit of the eyes and wont open up any more than that...the shrums have receeded and dont engorge themselves anymore they are nearly half there normal size now....i have no clue what could be causing this....here are my tests:

ph-8.4
nitrate-0
ammonia-0
nitrite-0
calcium-420
specific gravity-1.022
temp-81.1
lights:
2 vho super actinics (11a-11p) 2 250w MH (12p-10p)
flow:
2 mj 1200
2 mj 1200 mods. (lots of flow)
10% water changes every week

what else should i test for or do to get these guys to open up....

thanks
alfred