CO2 Perma-Seal O-Ring

Perma-Seal is used to prevent leaks between the CO2 cylinder tank and the CO2 regulator. Using a Perma-Seal replaces the need for cheap plastic O-rings that are commonly used when installing CO2 Regulators onto the gas tank. Plastic o-rings need to be replaced periodically because the gas pressure distorts the plastic over time. If they aren't replaced, this has the potential to lead to CO2 leaks and frequent refills to provide a consistent flow of CO2 to a planted aquarium. There is no need for replacement with the Perma-seal. Simply screw it into the CGA-320 connection of your gas tank by using an Allen key before installing your CO2 regulator.  

This product works perfectly with the UNS Regulators


This item qualifies for free shipping!

$ 7.99

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Because we love our plants so much and don't want to let them go, we only ship on Monday. Just kidding!

For the safety of these magical plants, we only ship Monday through Wednesday, and Friday. Orders placed after 1pm Pacific Time will be shipped the following day. 

Rimless aquariums and other hard goods will be shipped Monday through Friday via UPS Ground or freight.  When purchasing plants/livestock with any hard goods, they will sometimes be shipped separately; but don't worry, we'll be sure to keep you updated with your purchase!

Please make sure your shipping address is correct as we will not be held responsible for DOA due to an undeliverable addresses.



Hard goods can be returned up to 30 days after purchase for a full refund as long as the product is unused and new in box. We offer store credit for items that have been opened and used. Customer will have to pay for return shipping freight. 

We are unable to accept returns for perishable items such as plants or livestock.  However, feel free to reach out to us if you are unsatisfied in any way! We do provide 100% DOA (Dead On Arrival) protection.


DOA Policy

If your plants arrived DOA (Dead On Arrival), please provide a clear picture of the plants sealed in its original packaging within 12 hours of the package arrival at the shipping address. 

Send all pictures, along with your order number to or through Facebook Messenger.
During winter (under 50°F at your location), please remember to add a heat pack to your order to receive our DOA guarantee.  Orders without the purchase of a heat pack will not qualify for DOA replacements, refunds or credits.



Don’t worry, we’ll take care of your order as long as it fits within the guidelines above!


Gift Cards

We will not be able to refund gift cards for cash from the gift card receiver. However, if you purchased the gift card for someone and decide you need a refund, please contact us!

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