I have a 29g. with 8 cpo's in it. I always put the mothers in breeder nets and remove them asap. I loose babies right away, and I'm lucky to have any survive a month. I have lost no adults the whole time-8 months. I've had around ten broods and I've had three babies make it. I feed them crushed snails, peas, bloodworms and crab bites. My parameters are spot on. I put moss and marimo balls into the nets, and use a power head to get circulation. I have no pollutants of measurable amounts in my water. I know I've lost some to each other, but I can't figure this out. I also use tea leaves. I started off simple and after loosing several broods I started using live plants and leaves in my nets. Since then I've had a few make it a month and of those I've lost none.