thats why you cant breed them !!!
They need live prey such as roaches or crickets at least two times a week !
Bullshit!!! They don't need to be fed live food 2 times a week, 2-3 crickets every 2-3 weeks is more then enough.
We do agree that they need as much variation as possible in their food, and they also should be fed live prey every once in a while. But they are frugivorous in the first place, so their main diet should consist of fruits, and you should be able to keep and breed them on a strictly fruit based diet without any problems.
Again, variation is the key, and live prey should be on their diet, but they don't need it twice a week to get them to breed.
Our Phelsuma eat abouth 4 crickets per month each, and they produce offspring like there is no tomorrow.
In the wild, they live symbiotic with a cicade that excreeds honeydew, where they will stay a few inches under it to catch the honeydew when it comes out.
Now don't you think, if they needed live food so bad, that they would eat the whole freaking bugg?
In fact, most Phelsuma's, and other frugivorous gecko's for that matter that are fed live prey too often will start to develop overweight.., wich isn't very healthy for any living organism that we can think of right now.
With that being said, aside from klemmeri and standingi, Phelsuma's should always be kept as a pair and not in a trio or group.
It can work out for a while but the females usually can't stand each other so it's a recipe for disaster in our opinion, and we advise you to seperate the females as soon as possible.
Do you know the person you bought them from personally, and have you ever actually seen any of the baby's produced by your animals?
There could be a few different reasons for them producing bad eggs, it could be stress, from each other or from moving, or a combo of the 2, we will leave that in the middle.
I don't know how well you know the seller but if he isn't honnest with you they could be to young, or even too old for breeding.
But there is one thing that we are pretty sure of, it's not because you don't feed them live prey.