Where to get potassium permanganate, and will it hurt frog eggs?

So where do I get this stuff to treat the platnts? Didn't see anything at
Lowes or Home Depot. The aquarium store maybe?

Got up this morning and found frog eggs all over everything in the kiddy
pool where I put the new plants to quarantine them and pick the snails off.
I saw two little brownish copper colored frogs about the size of the tree
frogs that live in the pecan trees over by the kiddy pool last night--LOUD
little suckers too. Should I just leave the plants alone for now, until
the eggs hatch? Should I go ahead and use the PP? IF I put the plants in
the pond with the eggs still on them will the three Rosy Red minnows eat the
eggs?

Thanks so very much for all the information and help!