Description
xReliable diffusion for aquatic tanks, ponds, and growing systems
COOMATEC delivers a 12-pack of large air stones that create consistent bubble streams across water or nutrient solutions. Each cylinder diffuser measures 2 inches in diameter and 4 inches tall, designed to sink and rest on the tank bottom for steady bubble release. With a weight around 0.66 lbs per stone, these diffusers stay in place as you tune your setup, helping you achieve even diffusion without constant repositioning. Constructed from washable silicon carbide, the stones offer durability while remaining safe for aquatic life. Before first use, soak the stones completely in water for about two hours to optimize performance, and refresh with a gentle brush as buildup develops over weeks or months.
Key setup and compatibility details
- Stable sinking design (2" D x 4" H) helps form uniform bubbles across the substrate.
- Fits standard airline tubing of 3/16 inch diameter for easy replacement and upgrades.
- For best diffusion, pair with a high-output air pump (at least 10W or equivalent). More power can increase bubble activity.
- Durable and safe: silicone carbide material is washable and designed to work with aquatic environments.
- Widely applicable to hydroponic systems, koi ponds, aquariums, and other setups that use air-driven diffusion.
Durability, care, and maintenance
- Soak the stones for 2 hours before initial use to remove dust and improve flow.
- Rinse and clean regularly with a soft brush to prevent clogging and maintain airflow.
- Regular inspection helps ensure consistent performance and extend the life of your diffusers.
Versatility and value
- One pack provides multiple stones for multi-tank setups or larger displays.
- Suitable for homes, classrooms, or small commercial systems that rely on effective aeration.
- Silicon carbide construction balances durability with safe operation in aquatic environments.
In real-world use, these air stones can support steady aeration in tanks, promote healthy root zones in hydroponics, and offer reliable diffusion for koi ponds. While results vary by setup, the 12-pack design gives you options to tailor diffusion intensity and coverage without guessing when to replace components.
FAQ
Q: What size are the air stones and what tubing do I need?
A: Each stone is 2 inches in diameter and 4 inches tall; uses standard 3/16 inch airline tubing.
Q: How should I care for these air stones to keep them performing well?
A: Soak for 2 hours before first use; clean regularly with a brush to prevent clogging; replace as needed.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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