I've noticed that one of my 3 Zebra Danio has been showing signs of Ich (small white spots on fins, caught one rubbing against a plant..), I've removed the Danios from my 20g tank and and all I have left are 2 (small, froglet) Clawed Frogs, an Apple Snail and a half dozen Ghost Shrimp.

I know snails and shrimp are immune and I can't seem to find any information that would indicate a clawed or dwarf clawed frog has ever contracted ich and since everything I've read seems to indicate that the cure is worse than the disease when it comes to amphibians and invertebrates and ich would it be best to just allow the ich to die out since it now has no host?

Any advice would be helpful thanks!