Help./..Crocea not opening

[seamay]

My Crocea suddenly wont open?>#@$%^*. What could be the reason.he/she/it always was open with a Huge mantle and today out of nowhere...nothing..this is weird

[mbbuna]

what fish shrimp and crabs do you have? have you made any changes at all, like move rocks or the clam or change Ca additive start or stop adding anything?

[simon.007]

Check your iodine level.

[Tyrosinase]

After the lights go out check for pyramid snails.

[seamay]

when I first bought the clam I noticed a small white snail about 2 inches from the clam. I killed the snail. I have been looking almost every night now and havent seen any more. he is firmly clamped on the rock so I do not want to pick him up.
I havent checked my iodine levels but others are:
ph-8.0
phosphate-0(detectable)
0 nitrate/amonia
15-nitrate
alk-2.5 meq/l= 7 dkh

I have many sm blue legg hermits
astrea snails
2-cleaners (never in the same area as the crocea)
1 cbs
He is placed way up on the rocks about 4-5 in away from the 150w halide bulb.
again hes been PERFECT for the month or so I`ve had him.
One change...I added a lg red tree sponge yesterday in his local area. no die off as of yet and I do have a gigas in that area also.
If he reached out far enogh to touch a bushy acropora could this have stung him? he is close but always has been.

[deepbelow]

how big is the clam and what type of light is it under??

[mbbuna]

what fish do you have?

[seamay]

the clam is about 4+inches. I kepp it under 2x150w halides 10000k9.5 hours/day and 2 96w actinics 11.5 hours/day. Its is way up on the rocks under the halides.
For fish I have a naso, yellow tang, foxface, coral beauty, mandarin, 1 clark clown. Havent noticed any harrassment at all. though the clam is 90% closed it still responds to light. when I shadow the halide it will still react m mabey this is still a good sign.
Do they do this for some reason from time to time or is it a definite sign of a problem?

[mbbuna]

pygmy angels are nippers. you could have clams with them for years and they wont touch them, then you bring a new one in and they wont leave it alone. cut the top of a 2l clear soda bottle off to make a dome. drill holes in it for water flow and place it over the clam.

[seamay]

well as soon as I posted this ...the next day he mase me a liarl Now he is looking as good as he did b4. a whole lot of panic for nothing I guess (hope).