Hello everyone! Been having a problem with duckweed too. My pond is 70X400' been looking at skimmers to remove the stuff. Came accross the Pond Hippo. looks good. cost about $2500. I don't want to use chemicals. Too many Koi,turtles,frogs in the pond. Don't want to harm the critters. May try to build one using a trash pump. Take a look at there website. Looks like it can handle anything!
