Matti
Member
Oase never explains the order of their filter media in Biomaster canisters, Hel-X 13 and sponges.
After some research my believe is that the Hel-X -biomedia is placed at the bottom of the canister because that is where the incoming water is most oxygenated.
The Hel-X does the aerobic filtration. Above it are the sponge trays that do both aerobic and some anaerobic filtration.
What I don't understand why the Hel-X must be kept in the filter bag?
After some research my believe is that the Hel-X -biomedia is placed at the bottom of the canister because that is where the incoming water is most oxygenated.
The Hel-X does the aerobic filtration. Above it are the sponge trays that do both aerobic and some anaerobic filtration.
What I don't understand why the Hel-X must be kept in the filter bag?