Do not add any more animals to the tank. Remember frogs should be quarantined for 30 days before they are put in with a healthy population. Your female could be infected along with the tank if the dead or sick frog were in there at one point. You've only had them for a week. I would get the live frogs to a vet asap. If none of the frogs make it I would scrap everything inside the tank and start over with captive bred frogs.