Seachem 200 Micron Filter Sock - 7 x 16 Inch Barbs The Orbit 2 creates a

The Orbit 2 creates a different type of flow than a standard directional powerhead

Dense floss cartridge removes particles and debris

intelligent QST programming

The small dark piece is useful for nano aquariums

Seachem 200 Micron Filter Sock - 7 x 16 Inch Barbs The Orbit 2 creates aSeachem 200 Micron Filter Sock 7 x 16 Inch Seachem 200 Micron Filter Sock is a large mechanical filter sock designed for sump and overflow systems that need reliable particulate removal with a slightly more open flow profile than finer felt socks. The 200 micron rating allows larger particles to be captured while offering less resistance to flow than a 100 micron alternative. That makes it a practical option for aquarists who want a balanced approach