I use a postal scale that will weigh under a pound and up to 50 pounds. In my opinion the smartest thing I did was get one that could also run on batteries. You can carry it anywhere on the pond or even out in a boat if needed. They are very inexpensive. Think I paid about $30.

Dear Alcohol, We had a deal where you would make me funnier, smarter, and a better dancer... I saw the video... We need to talk.