What’s wrong with my anemone?

[Shinobu]

I’ve had this nem for a little over three weeks. It opened up really nicely, but last week it started moving from its initial spot, and has been looking like a little deflated and unhappy. At first it balled up with some tentacles poking out, now it’s kind of flat. It’s also expelling white stringy stuff during the day which I assume is poop. I thought maybe my water is off, so i tested it but nothing seems off. I think it’s stomach is kind of inside out as seen in first pic.
Alk: 7.5
Phos: 0.25
NO3: <10
Salinity: 1.026
Ca: 420
pH: ~8

 

[StartingATank]

Maybe it could be prepared to split?