Had this xenia now for about 4 months. It was growing real nice. It now has shrunk and the tenticals are all limp. Nitrates are at 0.. Ph is 8.4.. Ammo is 0.. I drip kalk at night. Alk is 8.4 Haven't checked Ca. in about a week, but i figure it's good. One other thing...I had a coral banded and cleaner shrimp that both died a few weeks ago, but fish are doing fine...Tang.. 2 clowns..a blue damsel and a bi color angel. Is it strange that both inverts died right around the same time? What could be the problem??