How do you tell if shrimps are ready to breed?

too bad i dont know the ages of mine. I just separated my blue tigers with CBS and CRS ..

and my other tank has blue pearl, yellows and sakuras

I heard these dont interbreed so i hope if any of them berries up, it's actually within same breed
 
blue pearls, yellows, and sakura(just a darker red cherry shrimp) will all interbreed bc theyre all neocardnra.
crs, cbs, and blue tiger will all interbreed also bc theyre cardnira. id suggest 3 tanks with
yellows and crs
blue pearls and cbs
sakura and blue tiger
 
Sakura and yellows are actually the same species, just different color variations, so they will definitely interbreed. Some people report that their blues and cherries dont interbreed, some do. The potential is there, however. If you plan on ever selling shrimp, I would separate all three colors. You cant sell the mud that they produce. If you just want shrimp and dont care about the colors, then it doesnt matter if they are together.

My guess is you read the chart backwards. :) check this one out. Red diamonds means they may interbreed, blue diamonds means they are safe together, red X's means that they will interbreed and shouldnt be housed together. http://www.theshrimpfarm.com/articles/dwarf-shrimp-compatibility-chart.php
 
too bad i dont know the ages of mine. I just separated my blue tigers with CBS and CRS ..

and my other tank has blue pearl, yellows and sakuras

I heard these dont interbreed so i hope if any of them berries up, it's actually within same breed

Good luck. It doesn't sound like you know what you really have. Blue pearl, sakuras (simply a deeper red variation of the red cherry that people charge more for because they can give it a different name) and most likely the yellows are all neocaridina heteropoda. That means they are simply variants of the same species. The net result? Interbreeding, which will result in a return to the natural wild coloration, which is kind of a brown.

Tigers and crystal black/red are caridina heteropoda variants. I don't know what the wild coloration is there, but it's safe to assume that yes, they'll interbreed.

You've set yourself quite the little dilemma by mixing and matching the way you have. Good luck sorting it out, because I know how well my RCS can hide in my tank, and all it takes is one missed shrimp to totally screw up the coloration in your tank(s).
 
Their chart is correct. You read it wrong. If you look at the title of the chart it is "Can these shrimps be housed together?" NOT "Will these species interbreed?" So everything that you read as "no, they will not interbreed" really meant "no, they cannot be housed together"
 
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