3 Dual Sided Sticky Sheets (6"x8") - Can be cut to size - targets adults
Gnat Sand (1lb) - targets adults
The sand covers 2-4 plants and it’s only used once to stop the reproductive cycle of the gnats.
The Bti makes 3-5 gallons of water depending on the concentration and is used more heavily (higher concentration) the first 1-2 weeks to stop growing larvae from maturing, and then as needed for maintenance.
The sticky traps last for a few months or more. Though most people take them down sooner.