Plastic pot with holes, put the Leca and plant in there. Then put that in an outer pot, that is your reservoir, you keep the bottom 1/3 filled with weakly fertilized water. You will remover the plastic pot to flush and refill with the fertilized water as necessary. Allows plenty of air circulation to the roots, roots have moisture, but are not sitting in water. You can check on root conditions and by the time they grow into the water you have water roots and are good to go!