Colombo Algisin 5L

Algisin is an effective and dependable treatment for blanket weed. Within a few days of application, blanket weed will begin to vanish. The pond should be devoid of blanket weed within around 14 days. Due to sunshine, blanket weed can develop rapidly and overrun plants. Due of Algisin's enzymatic impact, the blanket weed will be deprived of vital nutrients. The remaining algae can then be extracted using a coarse, fine net.

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