The BLS does not have a separate category for assistant principals. According to Salary.com, as of March 2015, assistant principals in the 25th-75th percentile earned $69,591-$93,291 per year, with a median of $79,831.n order to become an assistant principal, your surest path is to accumulate teaching experience and then earn a master's degree in education leadership or education administration.
The last cause of green water in pool water is metals, usually copper, that have oxidized. Metals can be introduced through source water, from some cheap algaecides, or, if the water is acidic, from the metal components of the pool, most commonly from copper heater elements.
Swimart's tips for turning your pool from green to clean: Check your chlorine levels. If below 0.5ppm you need to 'shock' the pool water with a large dose of chlorine to 10ppm. Ensure the filters are running and don't use the pool until the chlorine level falls below 3ppm. Lower the pH levels by adding acid.