Nitro Ring

Enhance your biological filtration performance with the Mountain Tree Nitro Ring, a high-efficiency ceramic bio media designed to support powerful nitrification and long-term water stability in koi ponds, aquariums, and advanced filtration systems. Engineered with a specialized oblique-cut ring structure and ultra-porous ceramic material, this premium filter media provides an ideal environment for beneficial bacteria to colonize and thrive.

The unique design increases surface area while improving water flow dynamics through the filtration system. This promotes both aerobic and anaerobic bacterial activity, allowing for more effective breakdown of ammonia and nitrites, and supporting the conversion of nitrates for improved overall water quality. The rough, porous surface helps bacteria attach quickly, accelerating the establishment of a stable biological filtration cycle.

Ideal for koi ponds, sump systems, canister filters, bakki showers, trickle filters, and freshwater or marine aquariums, the Mountain Tree Nitro Ring delivers consistent, high-performance biological filtration. Its durable ceramic construction ensures long-lasting use while maintaining structural integrity even in high-load aquatic environments.

Whether used as a primary bio-media or as part of a layered filtration setup, the Nitro Ring helps maintain crystal-clear water, stable parameters, and a healthier environment for fish, plants, and beneficial microorganisms.

Key Features:

• High-performance ceramic biological filter media
• Oblique-cut ring structure for improved water flow
• Extremely porous surface for beneficial bacteria growth
• Supports both aerobic and anaerobic filtration processes
• Helps reduce ammonia, nitrite, and nitrate levels
• Accelerates biological filtration cycle establishment
• Durable long-lasting ceramic construction
• Ideal for koi ponds, aquariums, sump systems, and bakki showers
• Suitable for freshwater and marine environments
• Improves water clarity and overall ecosystem stability

• 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.