Filter Foam Insert Exo Terra Bio-Foam for AC30 aquarium filter — replacement sponge

Exo Terra Bio-Foam is a replacement foam insert designed specifically for the AC30 aquarium filter. The sponge provides mechanical filtration by trapping suspended debris and particulate matter while its porous structure increases available surface area for colonization by beneficial nitrifying bacteria. Intended as a maintenance spare part, this foam helps preserve water clarity and support stable biological filtration in small aquatic and terrarium systems that use the AC30 unit.

Advantages

The open-cell foam construction captures fine and coarse particles without impeding water flow and offers a durable substrate for bacterial biofilm development. Because it is a tailored replacement part for the AC30, the insert fits securely and reinstates the filter’s intended filtration pathway after routine cleaning or media replacement. The material is washable and reusable, reducing the frequency of full media changes while maintaining effective mechanical and biological filtration.

Suitable for

• Maintenance replacement for Exo Terra AC30 aquarium filter
• Small freshwater aquariums and planted tanks using AC30 filtration
• Terrarium setups with aquatic components that require compact filtration
• Routine cleaning cycles where foam media is removed, rinsed, and reinstalled

Key specifications

• Material: open-cell foam suited for mechanical and biological filtration
• Function: traps debris and provides surface area for beneficial bacteria
• Compatibility: shaped to fit the AC30 filter’s media compartment
• Maintenance: washable and reusable with careful rinsing in aquarium water

How to use

Turn off and disconnect the AC30 filter before removing the foam insert. Extract the existing foam, inspect it for wear or damage, and replace it with the Exo Terra Bio-Foam insert by placing it into the media compartment in the same orientation as the original. Reassemble the filter, reconnect power, and restart the unit. After installation, monitor water flow and clarity; newly installed foam may temporarily affect flow until bacteria recolonize the surface.

Usage recommendations

Rinse the foam gently in aquarium water during scheduled maintenance to remove accumulated debris while preserving beneficial bacteria. Avoid using tap water with chlorine for rinsing, and replace the foam if it shows signs of tearing, compression, or persistent clogging that cannot be cleared by rinsing.