It's not the vinegar that is the problem it is the salt. Australia has some of the highest naturally occuring salty soil in the world. It is close to sterile. Whoever posted that homemade recipe is a bit reckless. Salinity in the soil is a major agricultural problem. It can make formerly useful farmland useless. And the effects of runoff into a pond, which would happen, would be brackish waters, sedimentation and eventually a sterile pond.
The number one used herbicide in the world both privately and commercially is Glyphosate. Formerly owned by Monsanto. Trademark, Roundup. Not no more. I'm using that Wise Up product at $23 per gallon, for a 41% active ingrediant. But I only use it near water during drawdowns and Summer. With a 3 gal mix I'd use about 10 oz.
