AquaTop Replacement Blue Filter Sponge for CF-300
Genuine AQUATOP replacement filter sponge designed for the CF-300 canister filter. This mechanical filter media effectively removes organic particles, foreign debris, and excess food from aquarium water. Suitable for both freshwater and saltwater systems.
Pre-cut to fit the CF-300 filter model for a secure and proper installation.
| Specification | Details |
|---|---|
| Filter Type | Blue Mechanical Sponge |
| Compatibility | Aquatop CF-300 Canister Filter |
| Quantity per Pack | 1 piece |
| Application | Freshwater and Saltwater Aquariums |
FAQ
Is this sponge compatible with the Aquatop CF-300 filter?
Yes, this blue filter sponge is specifically designed to fit the Aquatop CF-300 canister filter and is pre-cut for proper installation.
Can this sponge be used in both freshwater and saltwater tanks?
Yes, this mechanical sponge is suitable for both freshwater and saltwater aquarium filtration.
How often should the sponge be cleaned or replaced?
Please contact customer service for cleaning and replacement frequency guidance.

Katherine Reid –
The sponge fits perfectly into my CF-300 filter. It’s easy to install and helps keep the water clean by trapping fine particles. No leaks after installation and maintains good water flow.
Peter McGrath –
Works well in my saltwater tank. The blue color is visible and helps me monitor the filter’s condition. I noticed a reduction in debris in the water after using it.
Lillian Fisher –
Great replacement for my old sponge. It fits exactly and doesn’t clog easily. My tank water looks clearer now, and the filter runs smoothly.