Update:
My shrimpies are all looking healthy and happy, and I switched them out of the standby tank I had them in back to the one I had always hoped to keep them in. It is 5 liters. All of the lava rock and corals are finds from when I lived on Oahu.
UPDATE on new tank
Moderator: Mustafa
Re: UPDATE on new tank
Very nice!
You can take that string out of the tank if you want. It's only used for shipping and doesn't really provide any benefit to the tank.

Re: UPDATE on new tank
Question, I had a jar with a metal twist on lid and a jar with a spring clamp( like the tall one from your photo, in the background) Both of them developed rust. Have you noticed this happening to your metal springs or lids?
Re: UPDATE on new tank
I've had a jar like that on my kitchen table for almost 3 years and no rust. Unless there is somehow saltwater getting to it there is no reason for it to develop rust.