goGnats Liquid Concentrate (16 oz. bottle) is a poison-free alternative for the control of soil-fungus gnats, mites, aphids, moths, and other garden and hydroponic pests. goGnats liquid may be used as a plant and area spray, added to nutrient reservoirs or used as a soil drench. For hydroponics, it is recommended to add directly to reservoirs on a regular basis as a part of a plant maintenance program. Can be applied as a area spray or added to fertilizers and applied during feeding.