Two-part kills clam!

[Starry]

I just stated dosing 2 part the other day, and now I fear my clam is on its way out. Also the deep water acro right beside it is burnt on 1 side. Both are in the path of my return from the sump where I add the 2 part. I used Randys 2 part recipe except I used Kents turbo calcium (-20% as recomended), and Arm & Hammer BS baked 1hr at 300. My guess is that the calcium is the culprit.

The clam is spewing white slime and is "gaping"...think it's a gonner?