After several more additions of CYA (about 1 lb. per time) I am pretty convinced the granuals I found on the pools bottom wasn't from the CA after all.
The stuff comes out of the sock in, almost like, a dust--no way chucks of it could have escaped like that.
I swam down and grabbed a few, brought them back up and tried to crush them. They were really hard, almost like rock.
I'm thinking these small pieces are simply left over salt that didn't disolve. I didn't look at the salt well when I put it in, and this stuff looks white. I guess I assumed the salt would look more opaque.
My conclusion: Left over, undissolved SALT
