I just ordered 10th ghost shrimp and thought I read something about having to set up a drip system before you can put them on your tank, or can I just float them and add. Also, place I'm getting them from reccomends adding 1T. Aquarium salt. Per 10 gal of water b4 adding fish. What is the purpose of this? I've never done it with any of my other fish additions. Thanks in advance.