Why are salmon important to the environment, and what are the necessary water conditions required for their survival and reproduction? Objective Students will be able to determine if salmon raised at school will survive in a local water source by testing conditions. Background In previous lessons, students have learned what salmon need to survive – such as water temperature, pH level, and what type of macroinvertebrates would be living in their habitat. Lesson requires access to a water source i.e. stream, creek, river Teacher will need to know how to use the pH test kit. Preparation Duration: 90 Minutes.