My female did that once, it was right after the male (RIP, they were inseperable) was put into the hospital tank. That was a lot of stress for her because they had grown up together, they did everything together, even 'slept' be eachother. Anyways, she was about 2 1/2 weeks pregent when all of this happened. She started to poop a lot for about 2 days, then she was really skinny, so I think she was aborting them, or something like that, there were no dead babies alying around, but hse was very skinny and had been pooping way out of ordinary, I think she obsorbed them and used them for food. They do that sometimes during stressful times. Is or was there anything going on in your tank that could have to do this?
Ron