These crystal water soil and gem can be expand 15 gallons. can be recycled, NO toxin. It is a great substitute of water and soil. One bottle 340g can expand 60 times to 15 gallons. Pour 50-80 times of water to soak the gems for 4-8 hours. Drain of the the water when the gems have expanded. Put the gems into container and cover plants or flowers roots. Plants only need to be sprayed with water every 2-3 weeks.