Plant Quarantine 2 lb Stable Hybrid Oxidizer is formatted to make aquatic plants an inhospitable place for unwanted particles and parasites such as; string algae, duckweed, fairy moss, fish and frog eggs, parasites and snails. Pretreatment for plants, not to be added to pond or water garden directly. Gently conditions plants as it oxidizes and flos plant water and provides stability, manages TA and pH balance. Use 1 scoop per 5 gallons of water in plant holding quarantine container.