How to Build an Aquarium Refugium

A refugium can be a fantastic addition to any aquarium. One of the main uses for refugiums in the aquarium hobby is to have a place for algae to grow, thus cutting down on the algae in the display tank. Refugiums also serve as a breeding ground for many beneficial bacteria that will help keep the tank clean. Though there are several ways to set up a refugium, this article will cover a gravity-feed refugium over a display tank.

Things You'll Need

  • 45-quart Rubbermaid container Two 1/2-inch bulkheads Two 1/2-inch barb fittings Small pump 8 feet of half-inch hose 1/2-inch hole saw
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Instructions

    • 1

      Cut two holes into one side of the Rubbermaid container about 1 inch from the top lip.

    • 2

      Install bulkheads into the holes that were drilled.

    • 3

      Screw barb fittings into the bulkheads.

    • 4

      Cut the 1/2-inch hose into two equal lengths and push onto the barb fittings.

    • 5

      Place one hose end into the display tank and affix the output of the pump onto the other. (It should slide over the output easily.)

    • 6

      Fill the refugium with water and plug in the pump.