This is a cone - shaped sponge designed for hydroponic gardening. It serves as a replacement root growth medium for most hydroponic garden setups. With its conical shape, this sponge features a porous structure that facilitates air and water circulation essential for plant root development in soilless cultivation environments. It can be easily installed into hydroponic systems or used as a standalone growing medium. Suitable for various indoor or outdoor hydroponic garden applications where soil - free plant cultivation is desired. This product helps support healthy root development by providing proper moisture retention while allowing adequate airflow to roots. Ideal for gardeners seeking an efficient alternative to traditional soil - based growing methods. For best results, keep the sponge moist but not waterlogged. Store unused sponges in a clean, dry place away from direct sunlight until ready for use. Typically includes one replacement sponge per package, though specific quantity may vary based on product offering.