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7. Building and Observing Microcosms > Procedure II-1-2: Building Aquarium Micr...

Procedure II-1-2: Building Aquarium Microcosms

Insofar as is possible, our goal is to make each of our aquarium microcosms identical, using the same amount of sediment, the same amount of water, and the same amount and mix of aquatic plant life.

  1. Put on your gloves and goggles.

  2. Arrange all of your wide-mouth jars on your work surface, side by side.

  3. Transfer sufficient pond or stream sediment to each jar to fill it about one-quarter full. Try to keep the levels in all jars the same.

  4. If your plant specimens include examples that you found rooted to or lying on the bottom, place those plant specimens accordingly in each of your containers, trying to keep the quantities and mix the same in each of your containers.

  5. Transfer sufficient pond or stream water to each jar to fill it about 5 cm from the top. Again, try to keep the water levels as similar as possible.


  

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