Procedure Part 1:

Now we will attach the hoses to the bottles, place the electrodes, and glue the bottles in place.

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Step 4:

• Drill a hole in the top of each of the pop bottle screw-on lids.
• The hole size should be the size that will allow the plastic tubing to just barely fit into the hole.
• Insert the lengths of plastic aquarium air tubing. Seal around each hose with hot glue. Screw the caps onto the small bottles.

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Step 5:

• Insert an electrode inside the bottom of each of the two small bottles, and hot glue it to the inside wall of the bottle.
  

 

 

Step 6:

• Place the small pop bottles completely inside the large pop bottle.
• Hot glue each small bottle in place so it will remain secure.