Filter Foam Pad for Pre-Filtering Tetra EX500/700/1000 – Replacement Sponge

This replacement filter foam pad is designed for use as a pre-filter in Tetra EX500, EX700 and EX1000 internal aquarium filters. The sponge provides mechanical removal of larger debris, capturing uneaten food, plant fragments and suspended particles before they reach the main filter media and impeller. Intended for routine maintenance, the foam pad helps maintain water clarity and reduce the load on biological and chemical filter stages.

Advantages

The foam pad is cut to fit the pre-filter chamber of compatible Tetra EX series units, offering consistent mechanical filtration without altering flow rates significantly. It extends the service life of the main filter media and protects the pump from clogging by large particles. The open-cell structure allows easy rinsing and quick drying between changes, supporting regular maintenance cycles and predictable performance.

Suitable for

• Pre-filtering in Tetra EX500 internal aquarium filters
• Pre-filtering in Tetra EX700 internal aquarium filters
• Pre-filtering in Tetra EX1000 internal aquarium filters
• Routine maintenance and sponge replacement to reduce debris load

Key specifications

• Material: open-cell foam suitable for mechanical filtration
• Function: pre-filtration / mechanical debris trapping
• Compatibility: shaped to fit specified internal filter models’ pre-filter chamber
• Maintenance: washable and reusable with periodic replacement recommended
• Effect on flow: minimal restriction when properly fitted

How to use

Turn off and unplug the filter before removing the housing. Remove the old foam pad from the pre-filter compartment and inspect the surrounding media and impeller for accumulated debris. Rinse the replacement foam under aquarium water or dechlorinated tap water to remove dust and compress it gently to expel trapped air. Insert the foam pad into the pre-filter chamber with the correct orientation so it sits flush and does not obstruct impeller movement. Reassemble the filter, refill if required, and restart the unit. Inspect operation and flow after installation to confirm proper fit.

Usage recommendations

Rinse the foam pad during routine water changes using aquarium water to preserve beneficial bacteria. Replace the pad when it no longer springs back after squeezing, shows persistent staining, or causes noticeable flow reduction. Avoid using detergents or bleach when cleaning. For heavily soiled systems, perform more frequent inspections and cleaning to prevent reduced filtration performance.