Coldwater Shrimp Dying :(

[mama2tobes]

Hi, can you please help. We got a few cold water shrimp for our tank and 2 out of the 3 have died already. Our tank is established, we made sure we followed all the instructions to the letter before introducing them to the new tank so I don't know why they didn't survive. I reintroduced the one that survived this morning and he was doing fine until about an hour ago when we had to put him back in a bucket as he was on his back, legs wiggling in the air. He seems happier when he's in tap water that has only a little tank water in.

We have 2 goldfish in there too but they are tiny and although they have had a look at the shrimp they haven't been hassling him or trying to eat him as I've been watching them closely all day.

Please help. What can I do to keep my remaining shrimp alive?