Kemay 6 Pcs Fish Tank Air Stones - for Aquarium Ponds and Small Buckets

[Efficient Aeration] Made of high-density silicon carbide fired at high temperatures, producing dense and steady bubbles to increase oxygen solubility and keep your aquatic life healthy. [Durable & Stable] Features a weighted design that easily sinks to the bottom without extra weights; resistant to falling and sand loss, ensuring long-term reliable performance in any water environment. [Universal Compatibility] Designed with a standard 4mm connector, perfectly compatible with most 4/6mm airline tubing and air pumps (recommended power 2.5W or above). [Versatile Application] An ideal bubble diffuser for various scenarios including fish tanks, aquariums, small ponds, buckets, and DWC hydroponic systems. [Easy Maintenance] Simple to install and maintain. Please soak the stone completely in water for 1 hour before first use and clean regularly with a brush to prevent clogging.