Explore the effect of temperature and raw sewage on water quality. The experiments presented in this kit include poisoning effects of sewage and temperature on aquatic life, biological oxygen demand and the changes in BOD, interaction of sewage decomposers and other aquatic organisms, and the collection and observation of actual water samples. Includes enough materials for 30 students to work individually, comprehensive Guide, and reproducible worksheet. Shipped directly from the manufacturer. Not available with rush shipping. Delivery time estimated at 10-14 days or less. Gift wrap not available. Information on how to place your order by fax or by telephone. Product Number AAR100858