I want some amano shrimp but none of the local LFS have them. A couple of them said they could order them for me but I am a little reluctant. I have read that you should ask how long the LFS has had them before buying since they have a pretty high die off rate, similar ot otos. I would like to have 1 in my 2.5 gallon with the betta and 2 to 4 in the 29 gallon. How many should I have them order to hopefully end up with 3 to 5?