How to Make a CO2 Reactor for an Aquarium

Step-by-Step Guide

1. 1

   Step 1: Drill a hole in the lid of the 2L bottle.

   The hole should be just a tiny bit smaller than the plastic aquarium tubing
2. 2

   Step 2: Cut the end of the plastic tubing at an angle.

   This will make it easier for you to pull it through the hole , Pull the tubing through the hole in the lid until you have about 2 inches (5.1 cm) of tubing on one side of the lid.
   
   If the hole is too small, widen it with a slightly larger drill bit. ,, Place a stopper valve on the tubing and reattach the tubing you just cut off. ,, Use 6-8 cups so as to fill it no more than 3/4 of the way full. ,,,, Place the airstone inside the tank under the water level.
   
   The airstone should start to bubble in 1-24 hours.
   
   Usually it takes about 4-6 hours, but don't give up on it until the full 24 hours.
3. 3

   Step 3: Using needle nose pliers

4. 4

   Step 4: grab the end of the plastic tubing.

5. 5

   Step 5: Seal around the tubing by putting a thick layer of glue around the hole where the tubing comes out.

6. 6

   Step 6: Cut the tubing about 6 inches (15.2 cm) away from the lid.

7. 7

   Step 7: Attach an air stone to the air tubing on the outside of the 2L bottle.

8. 8

   Step 8: Fill the 2L bottle with lukewarm water.

9. 9

   Step 9: Place 2 cups of sugar in the bottle

10. 10

    Step 10: using a funnel to pour it in.

11. 11

    Step 11: Measure 1/2 a teaspoon of yeast and pour it into the bottle.

12. 12

    Step 12: Secure the lid on the 2L bottle and shake vigorously for 5-10 seconds.

13. 13

    Step 13: Place the 2L bottle near the tank.

Detailed Guide

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