Bleached BTA

[KelBell3113]

I have had my bta for a little over 2 weeks. I was not aware that they are not supposed to be white. So I have been trying to nurse it back to health. Yesterday it was looking great. Today it was almost fully detached from the rock it's been on since day 1 and all shriveled up, mouth closed. I picked it up off the sand and placed it on a rock. It hasn't attached or moved. I also have 2 peppermint shrimp that can be obnoxious. They harass it every day at some point. I need to know if I should quarantine the anemone? Is it dead or dying? Should I remove the peppermint shrimp? How do I help this anemone survive? I feed it small bits of brine shrimp.
14Gal biocube
Nitrates 5ppm, nitrites 0ppm, ammonia 0ppm, alkalinity 200ppm, pH 8.4, salinity 1.024, temp 77°
Actinic bulb and 10k daylight bulb
Air pump and stone.
Tank mates: Lots of live rock, hermit crabs, emerald crabs, snails, lawnmower blenny, peppermint shrimp.

 

[KelBell3113]

This was it yesterday

 

[mochaclownlover]

For starters, how old is your tank? You should probably remove the peppermint shrimp as they do eat aptasia but they will eat other anemones too.
Also, the lighting on the biocube is not enough to keep high light requiring inverts like BTAs so you will need to upgrade them at some point. If you do, I'd recommend Steve's Led ,SPS extreme kit for the biocube 14. It's the same one I have on my biocube and all my BTAs are thriving. Best of luck