Natural Calcium Source: The clay mix supplies a balanced source of calcium to help springtails thrive, supporting their nutritional needs and promoting long-term culture sustainability. Easy Harvesting: When you’re ready to use or transfer your springtails, simply turn the container over a clean surface and gently tap to collect them. 1 lb Pack for Multiple Uses: The 1 lb (16 oz) size provides enough clay to set up and maintain several cultures, making it economical for hobbyists and breeders.