What do you think about adding things such as scuds, snails, crayfish, and grass shrimp that you might not scoop up in a bucket of pond water? What about algae and weeds? You may get them whether you want them or not. Would you be better off proactively adding what you want when you fill your new pond rather than waiting to see what shows up after you've seeded from another BOW? You will also be "seeding" when you add fish. They come with their own organisms. And of course the other things that visit your pond, such as frogs, turtle, ducks, and herons will make their contributions. But none of these things ever added any plants to my old pond, or anything else that I could see, and the pond seemed to be healthy from the beginning.
