Mystery dead fish and clowns split up

[GHOSTLY]

So I have four fish. Four but after I fed some frozen food I noticed it this fish. I think it came from the frozen food it was mytis from hikari. Also my clowns split up for a hour. One lied on the floor and the other leaned on a rock on the other side. They are acting normally now but should I be worried? Also can I feed this dead fish to my anemone

 

[vetteguy53081]

Anemone can eat fish
Check your ammonia-ph- nitrate level
Prepare to change water if necessary. The food may be contaminated

 

[GHOSTLY]

Update. Anemone ate the fish. Everything's parameters are fine. I had four fish and still have four fish. But Clownfish seem to like hosting inside the encrusting rainbow Monti