I have keep bamboo shrimp for quiet some time now...
Most of them when i get from petco will not surivive a week or more due to stress, starvation, hungry strike, and parasite ( have one that drop on the floor for no reason and found a big bump on the side fo the body)
The most I went with keeping 1 is about 2 month then it die.
I pretty much keep my recieipts for as long as the Live Guarantee is active for a month. If they die, freeze them and bring it in whenever you can.
Keeping them at 80F or above seem to make them turn Bright Red! And to my experience, they would die later. (you could say it's like cooking a lobster slowly, i could be wrong)
Your water parameter is much better than mine....LOL!!
I would suggest lowering the tempture down more to 76-78. I use to keep my tank at 80-81F but now I am keeping it at 77F. Mine haven't turn red. They are staying at their original brown/stripe color which is a good sign.
I do have a high nitrate of 10-20ppm and this guy is still fine.
After trail and error, and adding some plants to help lower the nitrate a bit, I think mine are doing fine.
Got two of them. 8 more days and one of them will reach the 1 month mark!! One came with missing two legs but have recover back.
I have small size fish in there and I feed ken's veggie and earthworm stick. The little fish eat the stick and particlue float around. The shrimp fan and eats them!
I have seen 2-3 molt since i got them.
i also keep green lace shrimp in my other tank without much current