Have you been cycling your Sanzinia? You probably already know this but they are prolific copulators....its the end result that stumps most. Multiple males and a solid NTL to as low as in the 50s will really improve your chances of a viable litter.

I've just now started cooling mine gradually and will endup w/a NTL of around 57F or so for a good 60 days. Then in go both males for a chaperoned courtship.

Bill