Eheim Substrat Pro 2L

It provides an ideal sticky surface for the development of bacteria, so Eheim Substrate Pro helps bacteria to ensure rapid and intensive decomposition of harmful substances. Rinse the new Eheim Substrate Pro in the settled water. Place the Eheim Substrate Pro after the mechanical filler. Biological effects will begin after 2-3 weeks. When replacing and cleaning filter media, leave about 1/3 of Eheim Substrate Pro in the filter, and to activate the development of new bacteria, rinse the remaining 2/3 in aquarium water or replace with a new Eheim Substrate Pro.