I seem to be having trouble getting my RCS to breed. I've had them for quite some time now (some came with my endler's, then I got some from Zeez) but I've only ever seen one shrimplet. None of my females appear to be berried right now. I'm rather confused as to what might be going on, since everything I've read says that they are prolific breeders. I should be up to my elbows in RCS by now. Tank parameters are: 10 gal planted, 0 amm, 0 nitrite, 20 nitrate, 82* temp. Up until a couple days ago, I was supplementing calcium with crushed egg shells. I took them out to replace them with fresh but I forgot lol. I also had a random death the other day. Everyone was accounted for at feeding time the night before, but the next afternoon I had one dead adult female. Is there something I should be testing for in my water?