1. Manual removal: This is the most straightforward method and involves physically removing the lily pads from the pond. You can do this by hand or with a rake or net. Be sure to remove the entire lily pad, including the roots, to prevent it from growing back.
2. Herbicides: There are several herbicides that can be used to kill lily pads. These herbicides typically contain glyphosate, which is a broad-spectrum herbicide that will kill any plant material it comes into contact with. Be sure to follow the directions on the herbicide label carefully, and take precautions to avoid getting any herbicide in the water.
3. Biological control: Some fish, such as grass carp and koi, will eat lily pads. If you have a pond that is large enough, you may be able to introduce these fish to help control the lily pad population.
4. Preventative measures: There are a few things you can do to prevent lily pads from growing in your pond in the first place. One is to keep the pond free of debris, such as leaves and twigs. Another is to avoid overfeeding the fish in your pond, as excess food can provide nutrients for lily pads to grow.
If you are unable to remove the lily pads on your own, you may want to contact a professional pond maintenance service.