As the final filter layer, Eheim SYNTH should be placed in the filter, up to a maximum of 10mm thick.
It is recommended that after any fish or algae treatments have been used, a new layer of Eheim SYNTH should be installed.
Suitable for both freshwater and saltwater.
EHEIM filter medias are some of the best in the world. They are highly efficient, developed in their own research laboratories, and made from the best raw materials. They are continually checked and are guaranteed to be free from any harmful substances.