Dumb question...but I have to ask, do you have the shrimp with your Discus? I'm sure the answer's no...
Yep! Caridina can cross with Caridina, Neo can with Neo, but it doesn't mean they will in all cases.While the theories expressed here are some what true, they are not 100% true. Not all Caridina shrimp will breed with other Caridina shrimp. There are quite a few Caridina spp. that will not cross with others really! Take the Caridina Multidentata for example... They will not cross with any shrimp that I know off.