Efficient multi-stage filtration
The included sponge and pre-biochemical cotton work together for reliable mechanical and biological filtration.
1 / 11
Why customers love it
Fresh, clear water starts with simple, reliable filtration.
This replacement sponge and pre-biochemical cotton set keeps your aquarium filter performing at its best, supporting a cleaner and healthier tank with minimal effort.
- Includes both a replacement sponge and pre-biochemical cotton for multi-stage filtration
- Porous material traps debris and provides a surface for beneficial bacteria
- Helps maintain clear water and supports a stable aquarium environment
- Simple to install — no special tools or skills required
Why you'll love it
Supports beneficial bacteria
The porous material traps debris and provides a surface for beneficial bacteria to thrive.
Clearer, healthier water
Helps maintain clear water and supports a stable aquarium environment for your fish.
Setup
Simple setup
No electrician, no wiring, no fuss.
-
Choose your model
Select the filter model option (Model A through F) that matches your aquarium filter.
-
Replace the media
Swap out the old sponge and cotton with the new set — no special tools or skills required.
-
Routine maintenance
The durable design withstands regular cleaning and repeat use, keeping your filter running smoothly.
Specifications
The details that matter
- Product Type
- Replacement Filter Sponge and Pre-Biochemical Cotton
- Compatible Models
- HW/EW/LW/604/604B/603/603B
- Filter Model Options
- Model A, Model B, Model C, Model D, Model E, Model F
More details
Keep your aquarium filter running at its best with this replacement sponge and pre-biochemical cotton set. Designed to fit popular filter models, it ensures efficient mechanical and biological filtration for a cleaner, healthier tank.
- Includes replacement sponge and pre-biochemical cotton for reliable multi-stage filtration
- Compatible with a range of popular filter models for easy replacement
- Porous material traps debris and provides a surface for beneficial bacteria
- Helps maintain clear water and supports a stable aquarium environment
- Simple to install — no special tools or skills required
- Durable design withstands regular cleaning and repeat use
Ideal for routine filter maintenance in freshwater home aquariums.
A few things worth knowing
Everything you might want to know before you order.
Which filter models is this replacement sponge compatible with?
This replacement sponge and pre-biochemical cotton set is compatible with popular filter models including HW/EW/LW/604/604B/603/603B, and is available in options Model A through Model F.
How do I install this filter media?
Installation is simple — no special tools or skills are required, so you can replace the media quickly during routine maintenance.
Can this sponge be reused after cleaning?
Yes, the durable design withstands regular cleaning and repeat use, making it a practical choice for ongoing filter maintenance.
How do delivery and returns work?
Shipping
Free standard shipping
To United States: 1–3 business days processing, then 7–15 business days in transit. Estimates, not guaranteed dates.
Your dispatch email includes a tracking link. Contact us if it has not arrived within 5 business days of ordering.
Outside the EU, import duties and local taxes may be payable on delivery. See the shipping policy for supported destinations and conditions.
Returns
Request a return within 14 days of delivery. Standard eligible returns must meet the policy conditions; a €4 prepaid-label fee is deducted from the refund. Return shipping is free for faulty, damaged or incorrect items. Contact us promptly if something is wrong. Your mandatory consumer rights are unaffected.