Clam won't open

[ganowicki]

I have a squamosa clam that has not opened in about 3 weeks. It all started when my Co2 ran out for my calcium reactor, it took about a week to finally get it filled and up and runnig again. To this day it still has not opened up.

water parameters are fine. NO3 is nill, alk/ Kh and calcium are right on par. mg is perfect. I am just baffled as to why it will not open up.

any ideas???

thanks

Gord