Air Diffusor

Improve oxygen levels and water circulation in your pond or aquarium with the Mountain Tree Air Diffusor, a premium aeration solution designed for high-performance aquatic systems. Engineered with a heavy-duty stainless steel base and advanced porous rubber membrane technology, this professional-grade air diffusor produces a consistent stream of ultra-fine bubbles that maximize dissolved oxygen transfer throughout the water column.

The durable weighted design prevents floating and keeps the diffusor securely positioned at the bottom of the pond, even when used with high-output air pumps. Its smooth rounded construction eliminates sharp edges, helping ensure the safety of koi and other aquatic life. The imported eco-friendly Japanese rubber membrane is designed with irregular micro-pores that create finer, more evenly distributed bubbles for improved oxygenation and healthier water conditions.

Ideal for koi ponds, moving bed filters, aquaculture systems, aquariums, bakki showers, and biological filtration setups, the Mountain Tree Air Diffusor helps support beneficial bacteria activity, improve water quality, and maintain healthier fish environments. Available in multiple sizes to suit a wide range of pond and filtration applications.

Key Features:

• Premium pond and aquarium air diffusor
• Produces ultra-fine bubbles for maximum oxygen transfer
• Improves dissolved oxygen levels and water circulation
• Heavy-duty weighted stainless steel base prevents floating
• Smooth rounded design protects fish from injury
• Imported eco-friendly Japanese rubber membrane
• Irregular micro-pores create delicate, evenly distributed bubbles
• Supports beneficial bacteria and biological filtration
• Ideal for koi ponds, aquaculture, aquariums, and moving bed filters
• Durable long-lasting construction for continuous operation
• Compatible with high-flow air pumps

• Free Shipping is valid for orders with a subtotal exceeding $199 and all orders will be shipped via UPS. Items purchased for delivery after 3pm will ship the following day. Items purchased for delivery after 3pm on Friday will ship Monday.
• Koi Fish and Live Plants only ship Monday- Wednesday. For orders placed after 3pm on Wednesday, the order will be shipped the following Monday.
• For Motor Freight (LTL) Shipments, oversized or heavy items unsuitable for traditional parcel delivery are not eligible for free shipping. These items will be dispatched through a motor freight carrier, as indicated on the product page. Once the carrier receives your order, they will reach out to arrange a delivery time. An individual aged 18 or older must be present to sign for the delivery.
• You may return or exchange an unused or unopened item for a refund (excluding shipping and handling charges) within 30 days of purchase. Following 30 days, the item may be returned in exchange for a store credit. Return shipping cost are covered by the customer and some items returned will result in a restocking fee. Please click here to review our returns policy.
• To receive a refund for Live Plants, you must email ecommerce@fitzfishponds.com with the image of the item in the original packaging for review.
• To ensure Live Plants have the best chance to arrive without issue, it is recommended to select next day air or two day shipping options.
• Used chemicals and fish food are not returnable. In addition, all sales on Japanese Koi are final and non-refundable. Should you have any questions or concerns when your fish arrive, please call 908-420-9908.