The first thing that we did was we took some gravel infected with bacteria and we poured it into our habitat so the bacteria could take their place as the decomposers in the food chain. The next step was to pick a rock. I picked two tiny rocks for my habitat. The rocks were very important also because there was algae on the rocks and we needed that in the habitat. Now we move on to the next step: Mixing freshwater in with the salt. This step was to be the most complicated. First, we got a bucket and filled it with freshwater from a faucet. Then our teacher helper, Mr. David, poured salt into the freshwater. Then we measured how much salt there was. Turns out there wasn't enough freshwater! Mr. David had put too much salt! We had to keep putting in more freshwater until finally the water was even! The last step was to pour the water into our vases. This step was easy but at the end, we had a lot of water leftover! Then we took our vases and put them out int he garden.