These lead weights are commonly used when growing and storing aquarium plants. Easy to use, these weights are malleable and can be wrapped around the stem of an aquatic plant to prevent floating when storing plants for later use. Alternatively, they're the perfect weight for ensuring your aquarium plants stay put and also come in handy if extra weight is needed for aquarium decor! These lead weights are rust-resistant, non-toxic, and safe for use with live plants, fish, and shrimp species.