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Premium Circle Diffuser for Fish Tank, Koi Pond, Hydroponics, Outdoor Lake Aeration Ring - Koi Pond Air Diffuser Weighted (Single Ring/Dia.5.9‘’)

  • Based on 2 reviews
Condition: New
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Availability: 18 left in stock
Fulfilled by Amazon

Arrives Friday, Jun 27
Order within 7 hours and 13 minutes
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Size: (Single Ring / Dia.5.9‘’)


Features

  • -Japanese breeders use these Japanese aeration rings for their koi ponds to prevent dangerous oxygen depletion in both summer and winter. They can also be used for aquariums.
  • -No additional weights are needed as they are self-sinking, ensuring no risk of injury to the fish/koi.
  • -They provide excellent dispersion of air bubbles due to low internal resistance, resulting in minimal clogging or wear.
  • -With a 0.2'' thick hose, they are highly durable and long-lasting. Additionally, all models come with an extra 16.5FT air hose measuring 0.3''.
  • -These rings are ideal for providing aeration in filter chambers and for use in fluidized and moving bed reactors.

Is Discontinued By Manufacturer ‏ : ‎ No


Product Dimensions ‏ : ‎ 5.9 x 5.9 x 1.25 inches; 1.2 Pounds


Item model number ‏ : ‎ (Single Ring / Dia.5.9‘’)


Date First Available ‏ : ‎ May 11, 2023


Manufacturer ‏ : ‎ Cesfre


Best Sellers Rank: #148,720 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden) #649 in Water Garden & Pond Pumps


#649 in Water Garden & Pond Pumps:


Customer Reviews: 2.3 2.3 out of 5 stars 2 ratings


Item Weight: 1.2 pounds


Manufacturer: Cesfre


Item model number: (Single Ring / Dia.5.9‘’)


Date First Available: May 11, 2023


Item Package Dimensions L x W x H: 7.25 x 7.25 x 2 inches


Item Dimensions LxWxH: 5.9 x 5.9 x 1.25 inches


Brand Name: CESFRE


Target Audience Keyword: fish


Size: (Single Ring / Dia.5.9‘’)


Material: Other


Age Range Description: Mature Adult


Care Instructions: Keep away from Children


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Jun 27

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews


  • Single Inlet Limits Performance on 17.7’’ and 21’’ Models”
Size: (Triple Ring / Dia.17.7‘’)
statement: A fundamental design flaw, all ring models share the same single air INLET which is insufficient to provide optimal aeration—especially for the larger 17.7-inch and 21-inch models. These sizes require greater airflow distribution to maintain uniform and effective oxygenation for outer rings ... show more
Reviewed in the United States on May 14, 2025 by MM

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