Please try live soon!! You can always swith over later. But listen to my similar story. I hatched 4 babies out July 5. Only 1 of them ate from the beginning regularly. One of them ate once the first week after the initial shed and never again. Two did not eat at all. What has come of this??. I tried everthing like you. I realized I was trying too hard feeding them and disturbing them all the time. I was panicking because they were now 10 weeks old with no food! Two of them I gave to a friend to try and feed because I could not deal with the stress of all of them. He is babysitting until they get eating. I tried assist feeding them with no luck. They were just so turned off by food. There is one non-eater, I managed to assist feed.(9 weeks old at 67 grams). Once I got the pinkie in his mouth, he took it down himself. (Exactly 1 week later, I put a live fuzzy in his tank and bam! He took it right away!! Then, he looked ready for more so I defrosted a frozen. And again!!! He took this one. Someone explain that to me!!! A non-eater taking live then frozen. Anyway, It has been only days and he sits there waiting for more food. He has taken 4 more frozen/thawed. It is as if he finally realized who he was. Sadly, I am not sure if he finally got hungry because I got food in his belly the week before by assist feeding, or if it was finally just a timing thing. My other two have been assist fed by my friend and I am hoping they follow the same course. Sorry to babble but the whole feeding thing really got to me. No one could answer my questions about how long a baby can actually go without eating before its borderline unsafe. People say nature takes its course, but I think the assist feeding helps stimulate thier appetite.
Another thing is you really don't know if they ate already or not. You can't take the sellers word unless you actually saw them eat before you purchased them.
Good Luck!
-AS