The water reserve kit allows plants to receive the water necessary for proper hydration. THE KIT INCLUDES grid pipe indicator bag of expanded clay. OPERATION: Place the grid on the bottom of the pot, this will create space for the reserve water, sprinkle the grid with expanded clay and then proceed with the potting soil. The indicator tube will come out of the ground and inform you about the water level present. the clay will slowly release the moisture inside the pot ensuring self-sufficiency in water for several days. you will need to check the water level in the indicator from time to time.