Pocillopora polyp extension

[wdt2000]

Anyone have any idea what could cause all my pocillopora(not new) to stop extending for 48+ hours? All my others corals appear fine including acro's. This is occurring on both side of an 8' tank at the same time.

Temp 77-79
PH 8.2 - 8.3
DKH 8.3
ALK 2.97
CA 410
MG 1230

I have added a few corals(acro's and LPS)/clams recently and no know nippers in the tank.
3 Tangs (Naso, Kole, Sailfin)
1 foxface
2 Yellow Wrasses
2 clowns
1 Black cap basslet

1 peppermint
1 cleaner shrimp
1 emrald crab

Normal

Retracted with something fluorescent green on some polyps, not sure if this is normal because it has never closed up in the months I have had it and the other two Pocillopora are green.

 

[SnowManSnow]

does it stay retracted even at night?

 

[wdt2000]

yes it does

 

[jfingers8]

If it's staying retracted at night most likely there is something picking at it. Try to observe your tank a little more during the day and do some night searching. Had the same problem one time it was my foxface that was picking at my corals. I never caught him but he was the only fish in my tank with all sps corals and when i took him out all the polyps came out after a couple of days. Goodluck!

 

[jfingers8]

Just noticed you said you had a peppermint some people don't have a problem with them but i had 2 different occasions that i had peppermints and after a while they always went after my stylo's nothing else.

 

[wdt2000]

Just noticed you said you had a peppermint some people don't have a problem with them but i had 2 different occasions that i had peppermints and after a while they always went after my stylo's nothing else.

I had a red viewing light on last night. There is only one peppermint in the tank and he was no were near them last night. Not even on the same side as the one pictured. I guess I am going hunting again tonight.

Foxface is fat and happy, but I have caught him eating acans when hungry even though he is fat. That said I have never seen him even grazing near some of these corals.

 

[graveyardworm]

Possibly getting ready to spawn? It would be likely that they could all go at once.

 

[wdt2000]

Possibly getting ready to spawn? It would be likely that they could all go at once.

That would be nice! I will keep the camera close by.

 

[RRaider]

My pocs never open up at night but generally stay open during the day.