My tanks is about 27C, and the way I see how a tank get stable, is when the shrimps has babies, and those babies become the adult, and have their own babies, right now I have about 5 of those babies become adult all with eggs and babies, and at present I can see about 12 babies swimming around, some of the adults are still carrying eggs, so there should be more babies later on. like many people, I've been through trial and error, lost many shrimps on the way, and it's been about 5 months since I've started keeping shrimps.
Right not I have many reds of all variation, yellows/gold, a red and white bee (not sure what type) clear one, and some unknown ones that is gold and copper in color with weird markings, I call the mosquito shrimps, as they look like mosquito.
I've also had one or two king kong black, blue, snow white and cobalt blue, all died, I want to try some more cobalt blue later on, that's what got me started into shrimps.