I hate ghost shrimp. I had three in my 5 gallon tank and woke up one morning and one was murdered. The female and one of the males had paired up and the unfortunate lone male was disposed of. They would beat him up and take all the food. A week later the female had spawned then I woke to a murder/suicide and I was left with the spawn to deal with.. well, the filter dealt with them. They are no more. I am sticking to the moss ball unless it sprouts legs and we have yet another incident in that tank.