Even though our plants are very clean, we can't guarantee they will be 100% pest-free because we cannot be responsible for your aquarium. Please use it at your own risk. We recommended all customers rinse the plants with clean water and quarantine them before use. However, plants in Tissue Culture will be 100% free from pests, algae and never have been contacting with any aquarium. Due to the nature of the product. We don't guarantee our plants will be pests free. ( snails, algae, hitchhikers ) We don't guarantee our plants will be free of pesticides. We use homemade, organic pesticides in our greenhouse to control pests. We do not use pesticides that contain copper. Copper is toxic to invertebrates such as aquatic snails, crabs, shrimps, etc We don't guarantee your aquarium success or responsible for your aquarium inhabitant including but not limited to fish, shrimp, snail, turtle, etc. So please quarantine all plants when use!