Carbon Block Dechlorinator Cartridge 20"

For use in reverse osmosis, drinking water, and aquatic applications, this carbon cartridge is made using a combination of coconut shell carbon and activated bituminous carbon.


A popular option for reducing and removing chlorine, volatile organic compounds (VOCs), heavy metals like lead, mercury, copper, caesium, and strontium as well as lowering water hardness is carbon blocks.
They also make drinking water taste and smell better.
Water supplied reaches the block's inside as well as its exterior surface.
Purified water travels through to the inside of the block, where removed chemicals are stored on the surface.

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