Cool! What size is that Rubbermaid stock tank? You must be in a warmer zone than I am (central Indiana). When I empty the above ground stock tanks and catch the tadpoles, I have to move them into the one that's in-ground. What kind of frogs and toads do you have? I usually just have green frogs, but this year, 2 bull frogs showed up. I'm not sure if I should be excited or not! ;)