Two-Liter Flush! by Bob Harrison | Sep 12, 2019 | Biology | 0 comments Students have spent time designing a controlled experiment, which they carried out today. Behold: the 2 L flush! Submit a Comment Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website Save my name, email, and website in this browser for the next time I comment. Δ