Well.....my first concern is you have alot of stuff in a tank that is probably not done cycling yet. If the shark is not eating it will probably not lat very long as not eating is the #1 sign something is wrong, well maybe #2 after floating on the surface.
Check your parameters, Ammonia, Nitrite, Nitrate make sure they are all in check, if not you will have to either start doing alot of water changes, or find someone to care for your live stock until your tank is ready.
Anemones are very fussy about water quality, if your BTA looks bad it probably means you have a problem with your water chemistry. Anemones also prefer to be in a mature tank that has been up and running for a while so that all params are more stable.