Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Homemade weed killer. Pond safe??

I tried the recipe Backabit posted using regular vinegar from the grocery store, on my driveway. I only made up one batch as a test and it only worked on a few weeds. On other weeds it looked like they were starting to die but they came back. It was spring and not too dry and the weeds were still small. I was really disappointed.