D-766-S450：EXTERNAL FILTER-S 450L/H, for tank 30-45cm.
D-766-L600：EXTERNAL FILTER-L 600L/H, for tank 45-60cm.

•It adopts zirconia ceramic axis, which is strong and durable.
•The filter box adopts a trickle-type tilt design to allow the filtered water
to be evenly distributed on the filter cotton to enhance the purification
and bacterial cultivation effects.