1) 6 of the same plant.
3) 6 different types of water.
4) Grow light.
5) Ph strips.
6) labels for plants and water.
7) Plates to sit plants in.
Step 1: Get 6 of the same plants with the same soils.
Step 2: Get 6 different types of liquids (distilled water, bayou water, salt water, vinegar water, baking soda water, and tap water).
Step 3: Pour different liquids into different plants.
Step 4: Water and observe how the PH of the soil changed once a week for 6 weeks.
Step 5: Keep a tab of your results and compare.