Japanese Zeolite 20Kg

Your pond's ammonia levels are decreased with zeolite, improving the environment for your koi.
It removes ammonia from your pond's water by trapping and absorbing it.


Since ammonia is the principal killer of pond fish, it's important to keep the ecosystem of your ponds healthy. Zeolite can help with this process.


As the ammonia is absorbed by the zeolite, an overnight soak in salt will free the ammonia that has been trapped, allowing the zeolite to be reused.
Zeolite must be removed from your filter system if you need to treat your pond with salt or other drugs, as doing so will cause the ammonia to be released back into the system.

Is delivery free?

We offer free delivery on the majority of our products over £50. This excludes live fish and bespoke filters. Delivery to UK mainland addresses is £3.95 as standard, or £6.95 for express.

How do I return a product?
Get in touch via email or phone and let us know your problem, we will then help as much as possible. A postage address will be given for you to return the product back to us, and postage will be refunded where applicable to our terms and conditions, which are in line with consumer rights.

At Steel City Koi, we offer a wide range of safe and secure payment options when shopping with us.

Accepted payment methods:

Debit/Credit Cards (Inc American Express)

BACS (for faster dispatch of products) please get in touch for this

Cash upon collection *only for live fish

Pay Later options currently include Klarna and Clearpay