Toadstool Help

[kart racer]

I have a toadstool that hasnt opened up in the last few days. When I came home Friday my BTA had gotten itself stuck and chewed up in one of my powerheads. Nothing else seems to have any ill effects. Linkia star, serpent stars, crabs, shrimp or other corals. I changed about 30 gallons of water that afternoon. Could the anemone be the cause even though nothing else was affected or something else?
Water parameters Saturday:
Ammonia-0
Nitrite-0
Nitrate-about 5-10
PH-8.2
Calcium-430
Alk- 9.0

 

[piscian]

It could be getting ready to shed its top layer. I wouldn't worry until it's been a week. I got scared too the first time mine didn't open. But once it shed, it looked better than new.