Eheim EHFI SYNTHs, is a completely neutral product. It provides a final stage of filtration to ensure that the water in your aquarium is thoroughy clean.
The fine phenol free structure of this synthetic material traps tiny particles of dirt. It should be loosely placed as the last layer in your filter arrangement.
Suitable for fresh and marine water fish tanks. Recommended for use in the Eheim range of filters.
For models 2222, 2224, 2226, and 2228 we recommend a special EHFISYNTH pad.