[ChrisK]

Sounds like you're doing good so far, but take the green one out and into another similar tank as soon as you can because it's possibly bullied/stressed. No pics were attached, what are you using for a substrate - and the feeding seems OK so far for now as long as they're a healthy looking weight, until you learn more about supplementation, feeding schedules etc -

 

[ChrisK]

Yeah take the ff culture out of the tank - here's a good clip on supplementation and search youtube for "expert village dart frogs" for more in depth stuff you would wanna check out (keep in mind those frogs you're keeping will be way more skittish and shy than those tincs in the clips):