Different Shrimp in one tank?

The other main reason is that most species have very different care requirements as far as temp and hardness. For instance, neocaridina (cherry, snowball, yellow, blue pearl, etc) like harder water and warmer temps (in the mid 70's and up). Caridina species (like crystal reds, bees, etc) like cooler water and very soft hardness. Amanos are flexible and are excellent algae eaters. Ghost shrimp are different in that they are scavengers so can prey on smaller or juvenile shrimp of other species. Alot of us keep our shrimp in seperate tanks as well as it can be challenging to differentiate between the young and alot of people who keep shrimp, end up selling the eventual offspring ot other hobbyists, lfs, or trading for other stock,e tc.
 
couldn't breeding a different, less inbred species (i.e. wild bee) with a very inbred shrimp (say, CRS for example) introduce some stronger genes into the strain? then you could breed the next generation to a different group of CRS and eventually come out with more CRS babies that still retain enough of the wild gene to be a bit hardier?

I've read about this process with electric blue jack dempseys/wild JD's numerous times.. I'm assuming it's probably been tried with shrimp, but I'm wondering why it doesn't work and/or isn't openly documented.
 
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