Square Filter Sponge for Efficient Pond and Aquarium Filtration

Optimise the cleanliness and quality of your pond or aquarium water with this durable and versatile Square Filter Sponge. Supplied in either black or green colour depending on availability, this bio filter sponge can be used as both a mechanical and biological filter media. Easily cut to fit any sized sump or canister filter, this 38 x 38cm sponge effectively traps debris and promotes the growth of beneficial bacteria to maintain a healthy aquatic environment.

Features and Benefits

  • Versatile filtration: Can be used as both mechanical and biological filter media, making it suitable for various filtration systems.
  • Customisability: Easily cut to fit any sized sump or canister filter for a perfect fit and optimal performance.
  • Durable material: Made from high-quality sponge material, ensuring longevity and reliability in pond and aquarium applications.
  • Optimal water quality: Traps debris and promotes the growth of beneficial bacteria, maintaining a healthy and clean aquatic environment.
  • Available in two colours: Supplied in either black or green based on availability, providing variety for your specific needs.

How to Use

  1. Measure the dimensions of your sump or canister filter to determine the required size of the filter sponge.
  2. Using a sharp knife or scissors, carefully trim the sponge to the desired size, ensuring a snug fit in your filter system.
  3. Insert the cut sponge into your sump or canister filter, positioning it properly for mechanical or biological filtration as needed.
  4. Monitor your water quality regularly and clean or replace the sponge when necessary to maintain optimal water conditions.

Aqua Gardening Suggests These are Best For

This Square Filter Sponge is ideal for pond and aquarium enthusiasts who value water quality and the health of their aquatic ecosystems. Suitable for various types of filtration systems, this product is perfect for those looking for a customisable and durable filter media solution.


What is the primary purpose of a Square Filter Sponge?

The primary purpose of a Square Filter Sponge is to serve as both mechanical and biological filter media for maintaining clean and healthy water in your pond, aquarium, or water garden.

Does the Square Filter Sponge's colour affect its performance?

No, the colour (Black or Green) of the Square Filter Sponge does not affect its performance. Both colours have the same coarseness and size, and they will perform similarly as filter media.

How can I install the Square Filter Sponge in my filtration system?

The Square Filter Sponge is easily cut to fit any size sump or canister filter. Measure the dimensions of your filter and cut the sponge accordingly, ensuring a snug fit for optimal filtration performance.

Is the Square Filter Sponge suitable for both freshwater and saltwater aquariums?

Yes, the Square Filter Sponge is suitable for use in both freshwater and saltwater aquariums as a mechanical and biological filter media.

How often should I clean or replace the Square Filter Sponge?

The cleaning frequency of the Square Filter Sponge will depend on the specific requirements of your aquarium or pond, but it's generally recommended to clean it once every 2-4 weeks. Monitor your water quality and the sponge's condition, and replace it when it shows signs of wear and tear or loses its effectiveness.

Can the Square Filter Sponge be used in combination with other filter media?

Yes, the Square Filter Sponge can be used alongside other filter media to enhance your filtration system's performance further. This can include additional sponge layers, activated carbon, ceramic rings, or bio balls.

How does the Square Filter Sponge support beneficial bacteria growth?

The coarseness and porous structure of the Square Filter Sponge provide ample surface area for beneficial bacteria to colonize. These bacteria play a crucial role in the nitrogen cycle, breaking down harmful ammonia and nitrite into less harmful nitrate, ensuring a healthier environment for your aquatic life.

Still Unsure if This Product is Right for You?

  • Submit a question via the Reviews & Questions tab on this page, and our team will respond to you
  • Login to check your Aqua Gardening Member Price
  • Book a free Consult with the Aqua Gardening team here
  • Still Overwhelmed? Start your Gardening Journey with a free eBook here

(SKU: 124460)

Can be used both as mechanical or biological filter media, Easily cut to fit any sized sump or canister filter

Shipping Calculator

Enter the quantity of product and your Australian suburb name to calculate the shipping costs for multiples of this item only. You can calculate the shipping costs for your entire order, including international orders, on the Cart Page.

Free Shipping Eligibility

Aqua Gardening offers free shipping on most orders above $249 that are not bulky items.  Once you place all the items you wish to buy in the cart, the combined shipping price will be shown in the cart, including Free Shipping if you are eligible. For full details please see our free shipping eligibility here.

Delivery Information

Back Order products

These are products we usually carry in stock but are temporary out of stock. These products will be back in stock within a few days. We can send you an email notification when they are back in stock if you click on the “Notify me when back in stock” link. See the full details here.

Click & Collect Only products

These products can only be collected from our Brisbane showroom as we can not ship them. If you place any of these products in your cart, you will only see the Click & Collect option at the checkout.

Fast Dispatch products

These are products that we have in stock in our Brisbane showroom, and they are available for immediate Click & Collect or Shipping. Keep in mind that if you have a product which is not listed as a Fast Dispatch product in your cart, there might be a delay on your order. See the full details here.

Special Order products

Special Order products are products that we do not regularly stock. These products will be ordered specially for you, or dispatched directly to you from our supplier. See the full details here.

Ship-To-Store products

Products marked with ship-to-store can still be shipped to us to collect in-store! Simply check out with the shipping address: 3/4 Billabong Street, Stafford, QLD, 4053. Once your order arrives, we’ll email you to let you know that it is ready to collect.


1 Year Replacement Warranty - Store warranty, this product needs to be returned to Aqua Gardening for testing and replacement.


60 Day Returns - We will provide a refund, exchange or store credit where you have decided you no longer want the product and it is in new, unopened condition. More details...