The pH of the water will determine the toxic effects, if any, of these substances. For example, 4 mg/l of iron would not present a toxic effect at a pH of 4.8. However, as little as 0.9 mg/l of iron at a pH of 5.5 can cause fish to die. Synergy has special significance when considering water and wastewater treatment. The steps involved in water and wastewater treatment require specific pH levels.
Among the online streaming options available today, Netflix and Hulu are two of the most popular, but the focus of their content library is quite different. Netflix offers the widest selection of movies and thousands of older TV shows, while Hulu Plus offers a larger collection of current-season TV shows and a smaller selection of movies. One disadvantage with Hulu Plus is ads; Netflix offers an ad-free experience.
With that said, I have recently looked into the differences between Hulu Plus and Netflix, both of which cost $7.99 per month, a HUGE savings from a typical cable bill which costs about $100 per month with internet.