How to Make Infusoria

Infusoria are a bloom of microorganisms that are popular for feeding young fish. It it is cheap and prolific to make.This is the best food for new betta fry and other egg layers.


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    The Culture Container. Fill your bottles halfway with tap water treated with a water conditioner that removes chlorine. You must use treated tap water as regular tap water kills infusoria. You may also use water sucked out of a planted tank.
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    The Culture Medium. Place one lettuce leaf in each bottle.
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    Infusoria Food. Place one algae wafer in each bottle, you can also try some liquid fry food.
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    Waiting, waiting, and waiting. Let both cultures sit under bright light for a week or more.
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    Bacteria vs Infusoria. When the water is cloudy you have bacteria but wait a little longer.
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    Finding Infusoria. When one culture starts clearing up or turns pink you will have infusoria. The reason it clears up is because infusoria eats bacteria.
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    Clone Your Best Culture. Pour your good culture into the other culture.
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    Feeding your fry. Feed your fry a few drops at a time so the tank stays clean. Don't overfeed, it will make the water green.


  • Siphon water from live plants as they will contain infusoria.
  • Wash the lettuce well to remove any lingering pesticides, or use organic lettuce instead.
  • Liquid fry food will jump start your cultures.


  • Don't feed until the water clears as it could kill your fry.

Things You'll Need

  • Rotting lettuce
  • 2 bottles
  • Algae Wafers
  • Bright light

Article Info

Categories: Aquariums