Check the listing for details. AZOO TRI-SUPER SKIMMER FILTER for MARINE AQUARIUM. Condition: New. Listed at 19.00 USD. FEATURES :1. The uniquely patent design of cross current device results in strong water flow, minute bubbles and great surface tension.2. AZOO TRI-SUPER SKIMMER has the functions of whirling, flowing and pushing to collect protein organic compounds. By using the principal of whirling to eliminate the heavy metal, protein, fiber and organic compounds when air and water are mixed.3. It has flow adjustment valve to regulate the water level.4. It can be installed inside or outside the aquarium.5. It has a double way holder to install in all kinds of aquarium.6. It has plastic screws for rust free operation.7. Compatible with AZOO SUBMERSIBLE FILTER 1800. 8. For saltwater marine aquariums. Dimensions: 12" H x 4.5" W Track Page Views With Auctiva's FREE Counter