I just keep them warm, lol
The tank is black lava rock for substrate, has a chunk of driftwood some tubes, that's all. I have a sponge filter, and a canister. The canister has just bio media and also bags of crushed coral to keep pH high.
Parameters are pH 8.2, KH 5, gh 8, temp 82
Just keeping them in there, I started with one berried female last feb, and now I have hundreds.
How about TDS? I really like those shrimp, and they seem to be one of the few I could keep by mixing my rock hard well and RO/DI water.