Help! Dying anemone?

Hi everyone,

So I was given a rose anemone about 9 months ago. Everything was great until it split about a month ago. Both new anemones started off looking pretty healthy but now one has started to look very unhappy.



Unhappy anemone:





The other half seems to be happy and healthy, although he has been moving around recently.







What should I do? :help:



125G

Salt: 35ppt

Temp: 80

PH: 8.05-8.1

Ca: 430

Dkh: 12.1

Mag: 1400