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Warner Marine AS300 Advanced In Sump Protein Skimmer

Product #PS-WMAS300


Availability: No longer available

Description: Warner Marine AS300 Advanced In Sump Protein Skimmer, are advanced, in-sump models designed for use in a aquarium sump, submersed in approximately 6-8 inches of water and rated for aquariums up to 400 gallons.
Brand: Warner Marine


Product Information




Warner Marine AS300 Advanced In Sump Protein Skimmer

Rated for aquariums up to 400 gallons.

The AS-Series Protein Skimmers are advanced, in-sump models designed for use in a sump, submersed in approximately 6-8 inches of water. The AS-Series Protein Skimmers are manufactured from the highest quality 100% cell cast acrylic, Schedule 80 PVC Valves and Fittings and are equipped with high quality, high performance AIR-WHEEL magnetic drive pumps. The AIR WHEEL pumps mix large quantities of air and water to produce a large volume of foam. The AS-Series Protein Skimmers have been carefully engineered to provide increased performance by adding advanced features such as bubble diffusion plate technology and increased volume transition cones and high capacity necks.

The air flow and water flow are perfectly matched to the internal volume and design of the body to produce the maximum possible removal of organic matter from the aquarium water.

Warner Marine AS-Series Protein Skimmers are designed to be quiet, reliable and long lasting. In addition, AS-Series Protein Skimmers are highly energy efficient, consuming as little as 38 watts for an AS-150. AS-Series Protein Skimmers are compact, fitting under most aquarium stands in standard sized sumps and are easy to clean and maintain.

Includes two Sedra 9000 needle wheel pumps using 94 watts total.
Requires a footprint of 20 inches by 17 inches.
Skimmer Body Diameter 12 inches
Skimmer Neck Diameter 6 inches
Outlet 1 1/2 inches
Collection Cup Capacity 2500 mL
Max Airflow 1800-2200 LPH
Skimmer Height 23 inches
Total Height need to remove skimmer collection cup 23.75 inches

The Warner Marine Research Philosophy

The oceans reefs are a beautiful collection of water, marine life and most of the earths known elements. The ocean is a perfect ecosystem, capable of infinite growth, creation and re-creation of billions of life forms. The ocean has long fascinated aquarists around the world; the desire to contain this beauty in the home is nearly obsessive.

Building and maintaining proper water chemistry is the single greatest achievement of the marine aquarium hobbyist. We are now able to create aquarium water that is functionally and physically identical to the oceans reefs, allowing us to keep, grow and admire a wide variety of marine life from sensitive fish and living corals to microscopic floating algae. The modern marine and reef aquarium hobbyist uses a variety of different products to optimize, balance and condition the water to create an environment where marine life will not only survive, but thrive, reproduce and grow at levels similar to or beyond what is encountered on the oceans reefs.

These products, procedures and treatments must be selected carefully, with a strict attention to quality, efficacy and performance. The long term stability and success of the home aquarium is completely dependant on maintaining the water quality at an extremely high level without adding harmful impurities. Any water treatment, supplement or additive must work correctly from a scientific and chemical perspective and not be contradictory to established research and practice. In addition, these products must be formulated to achieve extremely high levels of performance, meeting or surpassing natural seawater. The modern marine and reef aquarium should generate a tremendous amount of growth and the biological demand for nutrients and elements is great. These nutrients must be delivered to the aquarium in precise quantities for optimum results.


  • Weight: 35 lb
  • Height: 26 in
  • Width: 14 in
  • Depth: 12 in
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PS-WMAS300

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List Price: $1697.84
Our Price: $1131.89
  (save $565.95, 33%)
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