Science Enterprises have petri dishes agar already setup to buy. The site also has recipes for making your own agar. The easier route would be to buy agar setup, and you would get more accurate results. Science Enterprises then says to store petri dishes in the refrigerator for up to sixty days as long as they are upside down. When you are ready to do the experiment allow the dishes to get to room temperature. It takes about one hour. Wear rubber gloves when doing the experiment. Antiseptic disks, made from paper towels that were soaked in different bacteria killing agents to the effectiveness are recommended to do the project. The best place to get the bacteria from is anywhere. In order to transfer the bacteria from the cotton swab to the trays, you gently drag the swab across the agar. Keeping the dishes away from heaters and windowsills is best, because they can alter the results of your project greatly. Store the dishes with bacteria and disks upside down in a warm location. After starting the experiment terminate it after four days. To terminate the experiment pour a small amount of bleach on the dishes and throw
Science Enterprises have petri dishes agar already setup to buy. The site also has recipes for making your own agar. The easier route would be to buy agar setup, and you would get more accurate results. Science Enterprises then says to store petri dishes in the refrigerator for up to sixty days as long as they are upside down. When you are ready to do the experiment allow the dishes to get to room temperature. It takes about one hour. Wear rubber gloves when doing the experiment. Antiseptic disks, made from paper towels that were soaked in different bacteria killing agents to the effectiveness are recommended to do the project. The best place to get the bacteria from is anywhere. In order to transfer the bacteria from the cotton swab to the trays, you gently drag the swab across the agar. Keeping the dishes away from heaters and windowsills is best, because they can alter the results of your project greatly. Store the dishes with bacteria and disks upside down in a warm location. After starting the experiment terminate it after four days. To terminate the experiment pour a small amount of bleach on the dishes and throw