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This lightweight clay aggregate is an excellent growing medium for any hydroponic system. Clay aggregates are heated at high temperatures, creating an inner pore structure and ceramic shell that holds moisture for roots and helps minimize the buildup of salts and nutrients. The aggregate wicks the water/nutrient solution upward, pebble by pebble, releasing it to the plant roots as needed. The uneven shape is an ideal surface for roots and beneficial bacteria. Pebbles range from 8–16 mm.
Clay aggregate is chemically inert, odorless, will not degrade and has a neutral pH of 7.0. It's easily washed, completely reusable and will last indefinitely. Excellent in systems with potted plants and in ebb and flow system trays. It readily accepts transplanted seedlings started in oasis cubes, Rockwool® or other planting media. Sold in 5 liter and 36 liter boxes.