K-Koi Replacement Foam Set 4 x4 Foam x1 wool

Three-piece set of filter foam

When combined with "Filter Wadding," high-quality sheet foam may be cut to any size and provides a big, affordable filter surface for sparkling water.

There are three-piece foam packs that can fit almost all sizes and types of biological box filters.


Each pack has three types of foam: fine, medium, and coarse.

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