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.
When you buy a cheap, fake gold ring, it's likely made of mostly copper. When you perspire, the metals in the ring react with the acid in your sweat to form salts, which are green. These acids are essentially causing the copper to corrode on the surface of the metal, which forms a salt compound of the metal. These salts are absorbed into the skin and the result is a decidedly green digit.