The 12 inch air stone balls feature durability steady bubbles and high dissolved oxygen rate Optimal for aerating your water reservoirs and livening up your aquatics A necessity to have in the house of aquatic lovers

Medium Bubbles: The air stone balls produce a good amount of dense bubbles A great way to increase oxygen solubility in your aquarium and enliven the aquatic lives Model: ASR-030 Jetting volume: 1 Lmin Recommended air pump power: > 2 W Standard ID airline tubing: 316 Well-built and efficient for long-time service Reliable Material: Made of mineral material and sintered at a high temperature great for aeration in fish tanks aquariums or koi ponds Keep fish or roots growing healthily Easy to Sink: Each ball measures 12 in diameter and weighs 1 oz Well weighted to sink to the bottom and lie stably in your tank without floating up Easy to Use: Soak the stone completely in water for 1 hour before use clean it regularly with a brush as it gets clogged after weeks or months of usage