I think the point of shrimp types being kept has been missed by the face book experts and other info.
Crystal types are so inbreed in one type of water that lots will effect them, where as cherry types and natives are more forgiving, The point to the story I am going to get a canning for is.
If you are keeping Cherry types or natives it wont make that much difference, if it dose not react to the vinegar test. If you are keeping Crystal types be careful and see what others in your area are doing, YOUR AREA as all water is different.
Also what sort of water are you starting with and that is the other over looked point!!! when I did keep Crystal types 6 years ago heat got them after 2 years. I had Coral in the tank, small amounts but my water is like rain water. When I get a controlled room done one day I will keep Crystal types again so heat wont get em.
The whole point to the story is, every one is to fussy about exact water and this is making them more reliant on that exact water type and the much over looked out come is, a geneticly weaker animal.
MY point of view and not a fact, but food for thought
Bob