Skip to content
  • 🔥 Save big on your favorite styles🛍️ 20% off 💃🏻
  • 🔥 Save big on your favorite styles🛍️ 20% off 💃🏻
Aquarium Products StoreAquarium Products Store
  • Menu
  • Aquarium
    • Fish Tanks
    • Filtration & Media
    • Aquarium Décor
    • Aquarium Lighting & Electricals
    • Aquarium Maintenance & Accessories
    • Marine Equipment
    • Aquarium Treatments, Foods & Planting
  • Pond
    • Pond Pumps
    • Pond Treatments
    • Pond Liners
    • Pond Filters
    • Pond Accessories
    • Pond Food
    • Preformed Waterfalls
  • Water Features
    • Modern Water Features
    • Traditional Water Features
  • SparesParts
    • Hozelock Spares
    • Blagdon Spares
  • New Products
    • No products in the cart.

      Return to shop

  • Cart

    No products in the cart.

    Return to shop

 

Evolution Aqua K1 Media 25 Litres

Home / Pond / Pond Filters / Filter Media & Foams
New
Evolution Aqua K1 Media 25 Litres
Evolution Aqua K1 Media 25 Litres - Image 2
Evolution Aqua K1 Media 25 Litres - Image 3
Evolution Aqua K1 Media 25 Litres - Image 4

$49.95 Original price was: $49.95.$34.97Current price is: $34.97.

SKU: D29YB 446630716 Categories: Filter Media & Foams, Pond, Pond Filters
  • Efficient and effective customer service, online.
  • Shop with Ease
  • Experience the difference quality makes.
  • Protecting Your Payment Information
Browse
  • Aquarium
    • Aquarium Décor
      • Aquarium Artifical Plants
      • Aquarium Ornaments
    • Aquarium Lighting & Electricals
    • Aquarium Maintenance & Accessories
    • Aquarium Treatments, Foods & Planting
    • Filtration & Media
      • Aquarium Filters
      • Aquarium Pumps & Powerheads
    • Fish Tanks
      • Aqua One Aquariums
      • Coldwater Aquariums
      • Tropical Aquariums
    • Marine Equipment
  • Pond
    • Pond Accessories
    • Pond Filters
      • Filter Media & Foams
      • In Pond Filters
      • Koi & Large Pond Filters
      • Pressurised Pond Filters & Kits
      • Ultra Violet Clarifiers
    • Pond Food
    • Pond Liners
    • Pond Pumps
      • Air Pumps
      • All in one Pump & Filter
      • Feature & Fountain Pumps
      • Filter & Waterfall Pumps
      • Pond Pumps by Brand
        • Blagdon Pond Pumps
        • Oase Pond Pumps
    • Pond Treatments
      • Blanketweed Treatments
      • Dechlorinator Treatments
      • Duckweed Treatments
      • Filter & Biological Additives
      • Greenwater Treatments
      • Pond Fish Disease Treatments
      • Sludge Treatments
    • Preformed Waterfalls
  • SparesParts
    • Blagdon Spares
    • Hozelock Spares
  • Water Features
    • Modern Water Features
    • Traditional Water Features
  • Description
  • Additional information
  • Reviews (0)

Description

Evolution Aqua 25L K1 Media

K1 media is engineered in a wheel shape and is slightly positively buoyant. This near neutral buoyancy allows the media to circulate throughout the vessel with only a minimal water flow.
This flow is created with your air pump and air stones or diffuser etc.

Maturing the K1 media is important because a delicate eco-system is naturally developing for the bacteria involved in the nitrification process. K1 media provides the maximum active surface area for the bacteria to colonise, more than other types of static media. It is this process which removes harmful ammonia and nitrite from the water.

How K1 media works

Maturing the K1 Media bio-media is important because a delicate eco-system is naturally developing for the bacteria involved in the nitrification process. K1 Media provides the maximum active surface area for the bacteria to colonise, more than other types of static media. It is this process which removes harmful ammonia and nitrite from the water.

How it is K1 media different to other media

As the K1 Media moves within the filter, it causes the old dead bacteria on the outside to be displaced. This makes space for new younger heavier feeding bacteria to rapidly colonise. Within the wheel is a protected surface which enables colonies of bacteria to naturally follow their lifecycle, of maturing, dying and then fueling the latter stages of the nitrification cycle. K1 Media has been designed to provide the best possible habitat for both young and mature beneficial bacterial colonies.

What is meant by ‘self cleaning’?

Unlike foam, matting, or other forms of static filtration media, the K1 Media is designed to move freely within your filter. The constant chaotic movement of the air from your pump, causes the media to self clean and thus requires no maintenance. This allows the filter to reach optimum effectiveness without the disturbance of periodic cleaning, avoiding unnecessary loss of bacteria within the filter. 50 Litres of K1 media will handle up to 250 grammes of food per day and for K3, 225 grammes of food per day. For retrofit of existing filters, K3 media is the most suitable due to its larger size and ease of control.

SKU

MEDIA25L

UPC

5060088870532

Availability

Please allow 2 to 5 working days for delivery

Our Ref

MEDIA25L

Reviews

There are no reviews yet.

Be the first to review “Evolution Aqua K1 Media 25 Litres” Cancel reply

Related products

New
Oase AquaMax Eco Twin 30000
Quick View

Filter & Waterfall Pumps

Oase AquaMax Eco Twin 30000

$317.00 Original price was: $317.00.$99.99Current price is: $99.99.
New
Nishikoi Clearwaters 10 Litre
Quick View

Blanketweed Treatments

Nishikoi Clearwaters 10 Litre

$119.99 Original price was: $119.99.$83.99Current price is: $83.99.
New
Oase AquaActiv Safe & Care Pond Dechlorinator 500ml
Quick View

Dechlorinator Treatments

Oase AquaActiv Safe & Care Pond Dechlorinator 500ml

$18.99 Original price was: $18.99.$13.29Current price is: $13.29.
New
Arcadia 13 Watt Ultra Clear UVC Lamp
Quick View

Pond

Arcadia 13 Watt Ultra Clear UVC Lamp

$14.99 Original price was: $14.99.$10.49Current price is: $10.49.
New
Oase AquaMax Eco Titanium 51000
Quick View

Filter & Waterfall Pumps

Oase AquaMax Eco Titanium 51000

$344.00 Original price was: $344.00.$99.99Current price is: $99.99.
New
NT Labs Acriflavin 1000ml Antiseptic & Anti-Bacterial Treatment
Quick View

Pond

NT Labs Acriflavin 1000ml Antiseptic & Anti-Bacterial Treatment

$30.99 Original price was: $30.99.$21.69Current price is: $21.69.
New
Nexus Eazy 300/310 Lid
Quick View

Koi & Large Pond Filters

Nexus Eazy 300/310 Lid

$124.95 Original price was: $124.95.$87.47Current price is: $87.47.
New
Heissner Telescopic Algae Brush 57cm - 140cm
Quick View

Pond

Heissner Telescopic Algae Brush 57cm – 140cm

$16.99 Original price was: $16.99.$11.89Current price is: $11.89.
OUR SHOP
  • My account
  • Checkout
  • Cart
  • Payment Method
CONTACT
  • About Us
  • Contact Us
  • FAQ
  • Returns & Exchanges
CUSTOMER SERVICES
  • Privacy Policy
  • Shipping Policy
  • Delivery
  • Term and Conditions
STAY IN TOUCH

Sign up for exclusive offers, original stories, events and more.

[contact-form-7 id="15"]
Copyright 2026 © www.usaquariumworld.com
  • Aquarium
    • Fish Tanks
    • Filtration & Media
    • Aquarium Décor
    • Aquarium Lighting & Electricals
    • Aquarium Maintenance & Accessories
    • Marine Equipment
    • Aquarium Treatments, Foods & Planting
  • Pond
    • Pond Pumps
    • Pond Treatments
    • Pond Liners
    • Pond Filters
    • Pond Accessories
    • Pond Food
    • Preformed Waterfalls
  • Water Features
    • Modern Water Features
    • Traditional Water Features
  • SparesParts
    • Hozelock Spares
    • Blagdon Spares
  • New Products
  • Login

Login

Lost your password?

Register

Your personal data will be used to support your experience throughout this website, to manage access to your account, and for other purposes described in our privacy policy.