Hi Caitlin! Your frog is suffering an infection and needs some help getting over it. Get a bottle of Melafix (natural mild antibiotic) at your pet shop fish area and use it daily following label instructions for a week. Let us know how it goes with it. Do not use any products that provide a "slime coat" since the binders can harm aquatic organisms in the long run. And yes, glad you got rid of the fish and snails; both are a source of pathogens. Good luck !