Protein Skimmer Counter Current - Large
This protein skimmer helps prevent toxic tank syndrome; increases oxygen; helps prevent toxic build-up; it is easily adjusted; has low maintenance; comes pre-assembled and includes: two-way plastic valves, airstone and hanger assembly.
Removes organics such as: water-soluble protein; amino acids; some dyes; fatty acids; fats; carbohydrates; enzymes; detergent; phoshorus; iodine; detritus; metals such as: zinc and copper; some algae; protozoa; bacteria and other organics.
Sits inside the aquarium, but not totally submersed. Aquarium or reservoir tank must be at least 23 in. high.
Info from Pet Place