4 Pack 2 Inch Aquarium Air Stone Balls Premium Porous Airstones for Fish Tanks, Ponds & Hydroponics Long-Lasting Oxygen Diffuser with Fine Bubbles, Sinks & Won’t Float (3/16" or 3/8" Tubing)

About this item

• 4-Pack Premium Spherical Air Stones for Reliable Replacement: Includes four 2-inch (50mm) round airstones, giving you ample spares for multi-tank setups or future replacements—no more running out mid-cycle. Ideal for hobbyists and professionals who demand consistent aeration performance.
• Made from High-Density Silicon Carbide for Long-Lasting Durability: Sintered at high temperatures for superior structural stability and chemical resistance. Unlike fragile ceramic stones, our carbon-silicon airstones resist cracking, clogging, and degradation—ensuring years of reliable oxygen diffusion to support healthy fish, aquatic plants, and beneficial bacteria.
• Ultra-Fine, Uniform Bubbles Maximize Oxygen Dissolution & Stay Submerged: Engineered with micro-porous structure to produce a dense, even curtain of fine bubbles that dramatically boost oxygen transfer efficiency. The weighted spherical design won’t float—stays securely on the tank or pond bottom for uninterrupted operation.
• Easy to Use & Maintain – Just Soak & Connect: Before first use, simply soak the airstone in water for 1 hour to prime the pores. Compatible with standard 3/16" or 3/8" airline tubing and works best with air pumps rated >4W. For long-term performance, clean monthly with a soft brush to remove mineral buildup and prevent clogging.
• Versatile for Aquariums, Ponds, Hydroponics & More: Perfect for freshwater/saltwater fish tanks, koi ponds, DWC hydroponic systems, aquaponics, and winter pond de-icing. Enhances water circulation, extends nutrient solution life, and prevents stagnation—making it an essential tool for any aquatic or soilless growing environment.

Overview

• Package Dimensions ‏: ‎ 6.89 x 3.74 x 2.28 inches; 15.52 ounces
• Date First Available ‏: ‎ March 15, 2026
• Manufacturer ‏: ‎ GOLD DEER
• ASIN ‏: ‎ B0GHY4TXQT
• Best Sellers Rank: #383,896 in Pet Supplies (See Top 100 in Pet Supplies) #1,962 in Aquarium Air Pump Accessories