Kockney Koi Large Sump Bottom Drain Size (Metric):110mm / 4" making them large enough to

making them large enough to be caught by the mechanical filter stages

They can be positioned either at water level for gravity fed systems or above water level for pump fed systems

Your fish has worms

- Fang gel technology emulates the smell and texture of foods that your animal would find in the wild

Helps maintain clear

Kockney Koi Large Sump Bottom Drain Size (Metric):110mm / 4" making them large enough toThe Kockney Koi Large Sump Bottom Drains are designed for the removal of solid waste and detritus. They should be installed at the deepest point in your pond. The bottom drain then leads into your filter system where all of these collected solids can be safely removed. These are a must have for any pond, and will help to keep your water crystal clear. Included in the box is a sealing ring for pond liners, and a domed cover lid.