Ok, I can't find any fake seaweed. I know that there are fish tank plants, but aren't those fairly expensive? I don't have a Hobby Lobby or a michaels around, so count those out. I checked a walmart, but they didn't have any. So my question is, do the plants have to be for an aquarium? If so, where can I buy them in bulk? If not, why other types of plants can I buy?