Medication and Single Quarantine Tank?

[Lija]

No, it is def not chytrid. Head tilt looks like neuro damage, why, Im not sure. I'm assuming their food is supplemented properly, you keep them clean and use dechlor water. Am I right?
are they WC or cb?

coccidiosis in frogs is usually difficult to diagnose, oocysts in fecal matter are often misinterpreted. Again assuming your vet is right and it is coccidiosis. Depending on a species they might be found not just in digestive system, but elsewhere too. If that is the case it is possible it causes neuro like symptoms.

Not sure who is your vet, didn't quite get it from FB link, but do you want to contact Dr. Frye for second opinion?