explain why pH level effect the salmon more clearly

PH values betwwen 7 and 8 are optimal for supporting a diverse aquatic ecosystem. A PH range between 6.5 and 8.5 is generally suitable. if pH declines below 6.5 fewer salmon eggs hatch and aquatic insect levels drop.

found it in www.thurstoncd.com/files/Optimal%20WQ%20Standards.pdf

According to the data, we can recall the last pH test that result is 6, the actually not suitable for salmon. However, it will be more clear about why it will effect a lot!