Source-Killer Bti Discs — 20-pack

The disc nobody else sells. Stop them from being born.

While other stores sell you another zapper, we sell you the off-switch on the breeding cycle.

A small disc floats in any standing water — gutter, birdbath, planter, pond, even the saucer under your potted basil. It releases Bti, a naturally-occurring bacterium that mosquito larvae eat and don't survive. Adult bugs never form.

• EPA-registered. Safe for fish, frogs, turtles, birds, pets, kids, and plants.
• One disc treats 100 sq ft of water surface for 30 days.
• 20 discs = enough to cover an average yard for the full mosquito season.
• Subscribe & save 15% — replacement pack ships every 90 days.

This is what mosquito-control districts dose your neighbourhood storm drains with. Now you can do your own yard.