So I figured out why the frogs died. When I got the organic dirt stuff, you cut it into chunks and place it into water so it expands. The stuff expands like 10times from its original size.
Our frogs are (were) small. They absorb the water from every thing they sit on or in. Since I did not treat the water that the "dirt" soaked in, they absorbed plain old tap water with all the wonderful chemicals that the city and who ever put in there. :( Thats what did it. Sorry little buddies!