Growstone Gnat Nix, 9 L

Scientifically proven Gnat Nix provides an effective, long-lasting physical barrier against fungus gnats. Used as a top dressing, it interrupts the gnats’ lifecycle by preventing adult emergence from hatching larvae and deterring females from laying eggs in the growing media. This gnat control is made from 100 percent recycled glass, and it’s 100 percent free of harmful pesticides and chemicals.