Zoos Wont open

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is back to save the day!
Jul 13, 2009
New Jersey
Alright well, as most of know i got a pretty nice Zoo rock that you can see in my thread. Anyways, i have it placed in the middle of the tank.. and it has medium to low flow. Only a small portion of the Zoos are opened.. And the others ones continue to stay closed. They were doing perfectly fine for two days, and now won't even open. Most of them anyways. Every othe rcoral in my tank is doing exceptionally well. Even the birdsnest's that i have. Im really confused as to why a fairly hardy coral doesn't look so good. Even my hammer coral have come out to play.. lol. Any help would be much appreciated. Thanks.
Ammonia: 0
Nitrite: 0
Nitrate: 10ppm
SG: 1.025
Phosphate: 0

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