Ocellaris 138s Black Sponge Pad
The Aqua One sponge pads for the Ocellaris 850 and Ocellaris 850uv canister filter trap solids and provide a home for filtration bacteria.
◾ Large surface area for bacterial attachment
◾ Larger pore size traps more solids
◾ Rinse in aquarium water and replace
◾ Change every 6 months to maintain performance
Why you should replace your Black Foam (138s) every 6 months
Aqua One's black filter foam serves a very specific purpose in your canister filter. It is situated in the lower tray of the filter and is much larger than the media that come later than it. The larger pore size means that finer particles of waste are trapped where they can be broken down by a large culture of friendly bacteria. The coarser media below trap the larger solids so the blue pad doesn't become easily choked and can deal with even tiny 'bits' leaving your set up with a very clear, healthy look.
The fine, black, foam pores do compress over time and can reduce the overall filter flow rate so do change the blue foam pad in your Ocellaris 850 canister filter every six months or so with a regular, monthly rinse out in aquarium water in between to keep it working well.
* See all aquarium spares and accessories for Ocellaris 850 and Ocellaris 850uv canister filters