Mountain Tree Lotus Root Nitro Ring 20L

The Lotus Root Nitro Ring II features with oblique section plus super porous, to maximize space for nitrobacteria growth and eliminate harmful substance.

It builds an exhaustive and healthy microsystem, and maximizes filter space at the same time.

Perfect choice for small filter system
Excellent biochemical filtration effect
Special design for maximum filter efficiency
Premium non-toxic material
Rough surface
The texture helps nitrifying bacteria attach and grow, thus greatly accelerating the establishment of a nitrification system

Special lotus hole structure
Helps the water to carry nitrite and nitrate into the nitrification ring for efficient denitrification reactions, and uses the anaerobic bacteria cultured in the micropores inside the nitrification ring.

Save more filter space
More filter space can be saved due to the oblique section, and the beveled nitrification rings accumulate together, which can disrupt the flow of water and prolong the flow of water in the area where the nitrification ring resides, so as to improve the filtration efficiency.

Benefit to cultivating bacteria
The micro hole helps to cultivate the aerobic nitrifying bacteria community on the surface of nitro rings, while the internal micropores are conducive to the cultivation of anaerobic bacteria for denitrification reactions, which decomposes NO3 into nitrogen and oxygen through denitrification.

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