Kusuri Eco Pure

The biological product Kusuri Eco Pure breaks down organic sludge, fish waste, flocculates particulate matter, improves water clarity, and contains helpful denitrifying bacteria strains that have been bio-fixed to a dense powder catalyst.


Algae and blanket weed contribute to keeping the water clean and clear by reducing the need for biological oxygen.


Weekly additions help Kusuri Eco Pure's beneficial microorganisms use the surplus nitrogen and phosphate.
Every pond is unique; while some ponds can be treated with Kusuri Eco Pure in just two weeks, most ponds will require four to eight.


As a preventive, use early in the season, followed by regular dosages.


dose for maintenance.
Use the provided cup, and for every 1000 gallons of pond water, add two heaping cups.
In a plastic bucket, swirl the calculated amount into 1 gallon of pond water.
Every week, use this solution to clean the pond's perimeter.

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