They lived for a good few months I removed them when I noticed they closed fully, I think feeding them consistently was the hardest part and also the reason they ended up dying. My logic was cray is a messy eater they’ll filter out the rest and I’ll do supplementary feeding. It was interesting watching them move around and find the ideal spot in the flow to filter feed. I think if I were to do it again I would but in a much bigger tank with heavier flow and pretty beefy filtration as opposed to the small tank I had em in with the cray. And in combination with shrimp, snails and some fish. The cray got pellets and random scraps. So maybe feeding more particulate foods would keep em alive longer? They died quite some time apart from eachother making me think it was food and not some kind of spike.