Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Hydrothol safe for fish if applied sparingly?

Take your depth reading at the deepest part of the treated area (if going back to shore) and divide it by 2 to get a close guesstimate on average depth.

Pouring it in like he does may work for him, but it makes the pour point way high ppm wise. If he were to do that with Hydrothol 191, I can almost guarantee you he'd be killing some fish.

Unless you are worried about the boat getting feet and walking off, lots of pond owners have a small jon boat at the pond upside down on shore. Small like 10'-12' in length.