Directions
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Cut the two bottles in half.
Discard one bottle bottom.
Layer one bottom with rocks
Fill that bottle one half full of water.
Add water plants, guppy and snail to the water.
Tie cheese cloth around the lip of one bottle top.
Invert that bottle into the bottom half of the watter filled bottom.
Layer this portion of the bottle with rocks.
Add about a half inch of sand.
The add about 2 inches of dirts.
Plant the grass seeds and water.
Put the other bottle top on top of the inverted bottle top.
Tape the three bottle together with clear tape.
Set the bottles near a window and watch the life cycle.
Record results daily. See chart.
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