PRICES MAY VARY. FIT FOR AeroGarden - The soaked growth sponge measures about 2.56"*0.95", compatible with all hydroponic systems on the market. Not only suitable for hydroponic garden systems indoor, it can also be planted in outdoor soil to help seeds germinate. ECO-FRIENDLY Sprouting Kit - Made of high quality peat cotton and organic matter, the seed germination sponges have good water absorption and breathability, with a medium balanced pH level to enhance the most suitable environment for s