How to Make a Sump Filter

A sump filter is the common name for a small aquarium used in the filtration of fish tank water. Many people use sumps to heat water or better filter the water in stagnate fish tanks. Doing things such as this help your fish friends become healthier and happier. While sumps are available at many aquarium supply stores, making your own is very simple and can be done both quickly and economically.

Things You'll Need

  • Small bowl
  • Water vacuum or suction hose
  • 10-gallon aquarium
  • Drill bit
  • Drill
  • Plastic hose
  • Silicone
  • Pump and filter with intake/outtake port
  • Water
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Instructions

    • 1

      Remove any aquatic creatures from your current aquarium and place them in a small bowl with water. This will be a suitable place for them until you are ready to place them back in the tank. Drain out the main tank using an water vacuum or suction hose. Set the 10-gallon aquarium that will be the sump tank behind or under the main unit, wherever it will fit the best.

    • 2

      Use a drill to make two holes in the back of the main tank. The holes should be around an inch from the top of the tank. The holes should be about an inch in diameter, just large enough for the plastic hose to fit through. Use a small drill bit and make numerous tiny holes to make the larger hole.

    • 3

      Place one end of the plastic hose in one of the drilled holes. Insert the second hose into one of the holes. Place clear silicone around the hose on the inside and outside of the hole to make sure the hose is tightly sealed. Insert the filter and pump inside of the 10-gallon sump aquarium. Without tearing or stretching the hoses, attach each free end to the pump. Make sure both the output and input of the pump is closed off with a hose.

    • 4

      Fill up each of the tanks with clean water. If necessary, wash out the tanks first. Turn the pump and filter on by plugging them into an electrical outlet. Inspect the hoses for any leaks. Look for any leaking around the drilled holes as well. Ensure the tank does not overflow with water or the hose does not become clogged.