Growstones Gnatnix 9L - Gnat Nix!™ is the only scientifically proven, environmentally friendly fungus gnat control product on the market Trials at Kansas University have shown that used as a top dressing, Gnat Nix!™ is an effective physical barrier against fungus gnats Gnat Nix!™ controls gnats at different points of their lifecycle, preventing adult emergence from hatching larvae and deterring females from laying eggs in the growing media As a result, their lifecycle is interrupted and its population is significantly reduced