just because a tank is a closed in environment doesnt mean they are safe from parasites. nemotodes are common in tanks, so are other little wormy things like planaria, which are present in ALL tanks i would start treating her with salt and melafix in a barebottom hospital tank ASAP. make sure the water is COOL! ACF are cool water frogs, using tank heaters can make them sick too. warm water gives bacteria wonderful breeding grounds and infect beloved ACF. good luck. read this website for better husbandry on your ACF.

http://aquaticfrogs.tripod.com