Petworx Gravel Cleaner 20in - Extra Large Marine Lighting Malawi: Use 5

Malawi: Use 5

They have more capacity than most biological media

Front to back adjustment works for 18" to 24" wide tanks

The foam slides out easily for quick cleaning

chemical and biological

Petworx Gravel Cleaner 20in - Extra Large Marine Lighting Malawi: Use 5Petworx Aquarium Gravel Cleaner 20" Instructions: Put the pipe with suction head into tank Put the other end of the plastic tubing into a bucket Shake the pipe with the suction head up and down until the water expels out automatically Move the head following the effective slant angle and agitate the sand gravel Dirt will be sucked out with the water into the bucket