Materials and Tools Required

Materials

• Sterilite 2.5 Qt FlipTop (reaction chamber)
• Tetra Whisper 10 Aquarium Air Pump (for enhancing airflow)
• Air Tubing and Air Stone (for creating the humid air)
• Empty Sabra Hummus Container, 10oz (or equivalent shape container - needed only for spacing the lid below in the right position above the water)
• Lid from 1 quart yogurt container (or equivalent - needed only for holding a coffee filter that holds the calcium hydroxide) ​ You will also need a high purity source of calcium or magnesium hydroxide. Calcium hydroxide can be purchased as pickling lime or as kalkwasser for saltwater aquariums.

---

Tools Needed

• Scissors (useful for cutting air tubing)
• If you do not already have a scale for weighing, you will need one that has a precision to the nearest 0.1g or less (0.01g is preferable).

Tools for the optional Box and Fan setup

• Drill with 8/32” drill bit (for fan mounting holes)
• Box cutter (for scoring and cutting the fan ventilation holes)
• Sharpie or other permanent marker (optional but very useful)
• Small reciprocating saw (optional - would be useful for cutting the round ventilation holes on the sides of the file box)

---

Optional Materials for Testing

• 5% distilled white vinegar (for testing for $CaCO_3$)
• Spoon (for dispensing $Ca(OH)_2$ without the need to pour it)

Assembly Time Required

Minimal unit assembly takes a few minutes, assuming you’ve already eaten the hummus from the hummus container. The file box + fan assembly can be done in 2 hours following the provided instructions.

---