I think you'd be okay if you treated your tank with some meds, but I don't know anything about the frog and how it'd react. I've used rid ich on tetra's before and they were fine (except for one which was severely infected with ich). Beware though if you have a glass tank, becuase rid ich will stain the silicone in the corners. If I was you, I'd put the frog in some sort of bowl for the time being and medicate your fish.
, you'd want to remove whatever filter media you have in the tank because if not, it'll absorb most of the medication and not do much for the fish.
, how big is your tank and was it cycled? I remember having ich problems when I just got into the fish hobby. It's a pain in the butt, but once you get the hang of it you'll love it much more than you already do.
12 gallon Eclipse: 5 Cherry Barbs, 4 Columbian tetras, 4 amano shrimp, 1 one in. pleco,
30 gallon tall Eclipse II: 4 Praecox Rainbow Fish, 2 Australian Rainbowfish, 3 zebra snails, 2 Clown Loaches, 2 Congo Tetra, 2 Boesemani Rainbowfish, 1 Red Irian Rainbowfish, 1 Bronze Corydora, 1 Golden Panchax Killifish, 1 Aplocheilus lineolatus Killifish, 1 Common Pleco (~5 in.), 1 candystripe Pleco (~1 1/2 in.)
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