I have many species of frogs and many and various sizes of tadpoles and small frogs from 1/2 in. to tadpoles 3 inches. This is months after first using eliminator and triclopyr for killing stumps, which were later covered with water after spring rains. Let's not throw the baby out with the bathwater. That is why I recommended a different glyphosate, eliminator, instead of roundup. I know it has done wonders for me with no harm, as you know roundup has done devastation to amphibians. I have searched diligently for specific surfactants in different products, but it seems that everyone is tight lipped. I know I had rather have less frogs than the condition I had, but then again, I didnt put herbicide directly into the water.
Thats what makes this forum so great. different views and experiences with different and similar products. As has been said many times, it is all about your objectives.