Paul, no I've moved the remaining four frogs to another tank with paper towels, I'll have to gut the main tank and clean it thoroughly again. I'll be keeping them on paper towels from now on.
Lija, I can't afford to get fecals done for the remaining frogs; at $80 each, it will cost me $320, which I don't have as I am a student, but thank you so much for your help and kind words. If I can save up some money, I'll try get some fecals done, but in the meantime do you have any other suggestions? Like keeping their environment extremely clean, etc?