Mantella frog breeding

[Duncan]

Hi All,

Looking for any help I can get to encourage my Mantella expectata (blue legged mantella) to breed. I've had these frogs for 9 months and although they show all the signs, they have yet to "consumate" the arrangement! I have 3 (2.1) in a 20 gallon terrarium, about a third vegetation (plants, moss, etc.) and wood, a third of pebbled shoreline and about a third shallow water. The two males call like crazy, the female is hugely round with eggs, but no luck. I've tried "drying" the tank out and them flooding it, but still nothing. Any suggestions?

Thanks,

Duncan