Sorry that you lost both your frogs. As I said before, I would not ever put another frog in that particular tank. The pathogen can persist for very long periods of time, even in the absence of amphibians, possibly through the use of other animals as hosts.

I would not want to risk possibly watching another frog die. If you want to keep frogs, I would strongly suggest setting up a new tank, and make sure to avoid any cross contamination between the two tanks. Also, always quarantine and test new frogs before putting them into a permanent enclosure.