Acclimatizing a tuxedo urchin

[cwatkins]

Well bad news.

Last night I noticed he wasn't carrying anything around any more, and overnight he didn't move from the spot where he was. I tried to give him a piece of nori directly, but I think it eventually floated away.

And this morning when I checked, he had lost 80% of his spines and wasn't moving.

What is going on? Water params are all 0. PH 8.4. SG 1.026. Temperature around 80.

Everything else is happy.

Could it be a bad test kit for something?