It depends on the meds, avoid clout, and the original rid-ich, Rid-ich 2 was formulated with more sensitive fish in mind so maybe that one. Both fish mentioned will tolerate salt/heat treatment as described in the sticky.
I do not know what is in Ick Guard 2 but there is a review of it on Loaches Online that says it is pretty useless as a treatment once the infestation is established.