--- product_id: 62859750 title: "30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use" brand: "pond h2o" price: "¥9898" currency: JPY in_stock: true reviews_count: 9 category: "Pond H2 O" url: https://www.desertcart.jp/products/62859750-30cm-12-inch-large-pond-airstone-air-stone-cylinder-bubbler store_origin: JP region: Japan --- # High output fine bubbles 30cm (12 inch) large diffuser bar Durable sintered stone, heat-treated 30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use **Brand:** pond h2o **Price:** ¥9898 **Availability:** ✅ In Stock ## Summary > 💧 Elevate your aquatic vibe with the ultimate bubble bar! ## Quick Answers - **What is this?** 30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use by pond h2o - **How much does it cost?** ¥9898 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/62859750-30cm-12-inch-large-pond-airstone-air-stone-cylinder-bubbler) ## Best For - pond h2o enthusiasts ## Why This Product - Trusted pond h2o brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last 🛠️:** Crafted from sintered stone fired at 1000°C for unmatched durability and easy cleaning—designed for long-term use without clogging. - • **Perfect Fit & Flow 📏:** 30cm length with standard 8mm (5/16 inch) airline fittings ensures seamless integration with most air pumps for consistent water circulation. - • **Maximize Oxygenation 💨:** Generates a large volume of fine bubbles to supercharge water oxygen levels, keeping your aquatic ecosystem thriving. - • **Versatile Aquatic Booster 🌊:** Ideal for koi ponds, marine aquariums, reef tanks, and hydroponic systems—boosts plant root health and invigorates fish with dynamic water currents. - • **Elevated Design for Cleanliness 🧽:** Bumper bars keep the airstone off pond bottoms, preventing debris buildup and maintaining crystal-clear water aesthetics. ## Overview This 30cm (12 inch) large pond airstone is a high-output, durable cylinder bubbler bar made from sintered stone fired at 1000°C, designed to produce fine bubbles that oxygenate and circulate water efficiently. Compatible with standard 8mm airline fittings, it’s perfect for koi ponds, marine and reef aquariums, and hydroponic setups. Its robust construction and bumper bars ensure longevity and cleanliness, making it a top choice for professionals seeking to boost aquatic health and aesthetics. ## Description Requires Airpump to operate, gives large volume of diffused Air Stainless Steel nipple. 12 Inches or 30cm Long. Sintered to 1000 Degrees for Fine Bubbles. 5/16th(8mm) Airline Fittings. Heavy Duty Bar Air Stone to successfully keep aquatic fish and plants aerated. Very durable, washable and sintered by high temperature. Creates water currents and underwater scenes, bubbles in fish tanks, aquariums, and ponds while attached to an air pump(air pump is not included). The airstones add oxygen to the water, as the bubbles aerate the water they also help circulating hydroponic nutrients invigorating the roots of plants and boosting healthy growth. Making for HAPPY fish... PondH2o 12 Inch (30cm) Airstone Cylinder Bubbler Bar, Large Air Stone Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use Review: Lots of air bubbles - I have been using a ring to supply the air bubble to the pond but after a couple of years it stopped working. I then looked around and found this large air stone and it seems to give out a lot more bubbles than the ring so I am very pleased with it. Review: Five Stars - great ## Features - High Output Airstone, Cylinder Bubbler Bar - 8mm or 5/16th Std Fittings - Sintered Stone For Long Lasting Fine Bubbles - 300mm / 12'' Long - Requires Airpump to operate, gives large volume of diffused Air Stainless Steel nipple. - One Of the Biggest on the Marketplace. Very durable, washable and sintered by high temperature. Creates water currents and underwater scenes, bubbles in fish tanks, aquariums, and ponds while attached to an air pump(air pump is not included). The airstones add oxygen to the water, as the bubbles aerate the water they also help circulating hydroponic nutrients invigorating the roots of plants and boosting healthy growth. Making for HAPPY fish...Bumper bars keep stone off bottom of pond ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00QQDJB5K | | Best Sellers Rank | 56,290 in Pet Supplies ( See Top 100 in Pet Supplies ) 292 in Aquarium Air Pump Accessories | | Customer Reviews | 4.0 4.0 out of 5 stars (55) | | Date First Available | 11 Dec. 2014 | | Guaranteed software updates until | unknown | | Item model number | Asc888 | | Manufacturer | United Aquatics | | Package Dimensions | 35 x 8 x 8 cm; 1 kg | | Part number | Asc888 | | Power source type | pump required | ## Images ![30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use - Image 1](https://m.media-amazon.com/images/I/41VPNEeRr6L.jpg) ![30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use - Image 2](https://m.media-amazon.com/images/I/81KHcosNpRL.jpg) ![30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use - Image 3](https://m.media-amazon.com/images/I/8173rtA7rlL.jpg) ![30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use - Image 4](https://m.media-amazon.com/images/I/81-8TQETRIL.jpg) ![30cm (12 Inch) Large Pond Airstone, Air Stone Cylinder Bubbler Bar, Large Air Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use - Image 5](https://m.media-amazon.com/images/I/41u9emvgUlL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Lots of air bubbles *by J***T on 3 June 2020* I have been using a ring to supply the air bubble to the pond but after a couple of years it stopped working. I then looked around and found this large air stone and it seems to give out a lot more bubbles than the ring so I am very pleased with it. ### ⭐⭐⭐⭐⭐ Five Stars *by S***E on 18 November 2017* great ### ⭐⭐⭐⭐ Works a treat *by L***S on 28 August 2019* Great piece of kit ## Frequently Bought Together - Pond H2o 12 Inch (30cm) Airstone Cylinder Bubbler Bar, Large Air Stone Diffuser for Water Garden Koi Fish Ponds or Fish Tanks, Saltwater, Reef, Marine Aquariums and Hydroponic Use - Aquascape Pond Plant Potting Media, Nutrient-Rich Aquatic Soil for Water Gardens, Supports Strong Root Growth, 215 Cubic Inches, 89002 - Aquascape Faux Log Fish Cave, Predator Control and Decorative Shelter for Koi and Fish, Ponds, Aquariums, and Terrariums --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/62859750-30cm-12-inch-large-pond-airstone-air-stone-cylinder-bubbler](https://www.desertcart.jp/products/62859750-30cm-12-inch-large-pond-airstone-air-stone-cylinder-bubbler) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-10-23*