For my group plant experiment we put seltzer instead of water.
On our manipulated variable there were four quads with four wicks seven plants with five leaves on each plant. For our controlled variable there are four quads with four wicks and four plants with five leaves on each plant.
Our group of three worked well. We all agreed on thing and were friendly.
But, if we feed the plant seltzer then the plant will die because carbonation has gas and gas kills plants.