Keep your discoids on high protein cat or dog food, apples, oranges, and with plenty of heat and you should start to get results. They are a pretty good breeders, but not as good as the prosticus and dubia. The prosticus are very popular because they are a little cheaper, and they breed very well for a non-climber. There downsides are a stronger defense musk than the other species, but it has never bothered me. The dubia are a very good roach. Great breeders and the perfect size. There downside is they are very hard to find and generally more expensive. It takes time with any non-climber, but they are worth it.
James