Worm-Away is a soil and grass conditioner which helps prevent the growth of earth worms. While worms are very important for aerating and mixing soil, their casts can also cause problems in very smooth lawns, bowling greens and golf courses. Earth worms also attract birds, and a flock of birds is the last animal you want visiting airports. Worm Away is manufacture from recycled glass bottles to form a fine glass sand, the product is only supplied in 1 tonne big bags, 25 kg bags on request.  This is  a similar product that many companies are now using as a filter media in swimming pools and water treatment.  We would not knowingly supply WormAway for this application.