Hach TEST KIT, MD-2 ACID DRAINAGE is very useful for few conditions like iin areas where strip mining has occurred, runoff is often either acidic or alkaline and may contain large amounts of soluble metal salts. It could cause pH changes or other wise contaminate lakes or streams, kill fish and bans on public use may result. The Model MD-2 kit provides the analytical capabilities needed to monitor these parameters. Iron and pH determinations are made using a color comparator with color disc, while acidity and alkalinity tests use easy drop-count titrations.