It looks like they may be the polychaete worms. Hopefully they'll
start disappearing when I restock my tank.

How I overdosed in calcium?
Good question, I thought I was doing everything right. When I last
checked it my calcium was on or below 380 mg/L. I added a couple of
capfulls of the Ca supplement (the label says it only increases Ca by
about 3mg/L so I thought it was safe to add two cap fulls).
I had also been adding some of the coral vitamin supplement, which
doesn't really specifiy the amount of calcium. so I was rather liberal,
probably two capfulls.. I added all this within a week. I had done a
partial change, only 6 gallons, about 10 days earlier that's why I
added these supplements.

When I returned from work I was horrified to find my tomato clown,
scooter, mandarin (a.k.a. chumbawomba), and cleaner shrimp were all
dead or dying. The blue tail damsel was semi counscious... (the
******* survived the massacre).
my star polyps, purple flower pot, and zoos were all fine. The only
livestock I had added that week were some star polyps.

Upon testing the water levels everything seemed within normal levels.
NH3 was at 0. Nitrate was a little high, don't remember how high but
it wasn't alarming. Calcium levels were off the charts.. I don't know
how high but it was definately over 600 mg/L because I stopped testing
after adding like 30 drops of the testing solution.
What did I do wrong? I don't think I did... unless the additives
mislabled the amount of Ca, or if I just can't do math...

I've had some problems with my downstairs neighbor.. the thought that
he got into my apartment and sabotaged my tank also crossed my mind....