Kevin,
I so much like your biotheme. Both you and Michael have kept grass/ghost shrimp. They seem to me to be very similar to Peppermint Shrimp in there needs. Normally a third smaller than peppermints. As best I know, I have collected these, Palaemonetes vulgarisms, in both fresh water ponds and salt water marshes.
Https://www.livebrineshrimp.com/ShrimpJanitor.htm
I plan on collecting these first, in the Austin area, then traveling to Texas Gulf Coast. By having winter hardy livestock in 500G outside propagation tank, I will not incur the electrical cost to heat water to tropical temperatures.