I would definitely switch over to pinhead crickets as soon as possible, I feed my small Pacific Chorus frogs them and they're both very healthy, happy frogs. Also, if the ants are wild-caught they may be harboring pesticides, viruses, or parasites that could harm your frogs.

Also, what substrate are you using? I personally recommend Coconut Fiber for Tree frogs. It's sold in bricks sometimes under the name of plantation soil, and it's safe, natural, and can be digested with little to no risk of impaction.

I would provide lots of plant cover if you haven't already, and make sure that at least 2/3 of the tank is land, not water. I use a medium-sized ornate clay bowl for a water bowl in my Chorus frogs tank, it goes very well with the coconut fiber.

Also, if you're fine with it, could I see a photo of your setup?