Tank trouble!!

[Aquattro]

Jamie, I don't think that's it. I had a clam die once and I know how it acted. This clam is still responsive to light and is partially open. It was perfect until the moment I plugged in the PH. It has been fully expanded, non-gaping and growing steadily. I have about 1/3 of an inch growth in the shell in 3 months. I believe there is a pic of this clam in the second batch of pictures I posted the other day. It looks, well, happy as a clam!!