OK. So here are the pics of two teardrops I put in QT. They are much better off than they were in the display tank, but I figure posting isn't a bad thing. Also, the clams in the display seem to be a bit better off today. I will try to take some top-down pics of those today as well.
First three are of the same clam:
Second set are of the second clam:
Taken with the lights off:
The green hue on the second one is interesting. Any comments?
These are in way better shape so again I have to assume there is either a pest or a water quality problem. The QT is half system water and half fresh made SW, and does not currently have a skimmer or any kind of filtration. This is because i am waiting on a pump for my skimmer to replace the one that froze. This is an entirely separate system from the display I removed the clams from.