Systems and methods are provided for determining the volatility of weather derivative option contracts. The garnet settlingfiltration system comprises a settling tank, which utilizes a removable, disposable settling weir, which is received therein. The apparatus determines whether the modification to the action results in alleviating the user frustration, and may store data that causes the modification to the action to be subsequently performed. The medium is directly or otherwise electrically coupled to one of the electrodes.