HELP!!! BTA concern

[Beano1169]

Hey all, I have just recently started a pico tank and have had it running for about 20 days now. The water parameters are as follows:
PH- 8-8.2
NH4- 0ppm
No2- 0ppm
No3- 0ppm
Sg- 1.025 - 1.026 (still working on adjusting the ATO)
dKH- 8-10
Ca- 420-440
temp range- 75.9 (7:30 this morning) - 80.8 (7:30 this evening) degrees ferinhieht no heater in the tank at the moment

Live stock:
PomPom crab
Rose BTA 2" (not doing so hot)
3 x Sexy shrimp
1 blue legged hermit
2 turbo snails

I am concerned that my anem. is stressed beyond belief and I want to help solve the issue. He has been in the tank for 3-4 days now and was perfect the first 2, now he seems to be deflating and excreting brown sludge which I believe to be zooxanthellae. If this is the case does anyone know what I can do to help him? I have a 31 white light fluval spec lighting system atm, I am curious if this is unsuitable for him? please any suggestions are greatly appreciated

-jay