and or the unit has not been initialized or programmed salt should be added slowly into the filter compartment while all of the jets are operating the jets should operate an additional 10 minutes after the salt is fully added an example of a target salt concentration is 1000 ppm high demand users can add up to 2000 ppm salt which will lower the hours required to generate chlorine and therefore lower the use level a salt level reading is preferably taken every time the unit begins a generation cycle to ensure proper salt levels at start up and during the time between water changes typical operation of an illustrative system preferably requires a weekly chlorine and water quality check to ensure that the system is working correctly although the user is not required to enter the chlorine concentration the value is needed to determine the use level over the course of the first month the user may determine their use level by taking a reading of the water before they enter the spa if the chorine level is low e g u201c 1 u201d or less the user will want to increase the use level by one to increase the output if the user finds that the chlorine level is 5 or higher the user will want to drop the use level by one and retest in a few days or a week if the bather load is predictable the use level may only need occasional adjustments if the bather load is sporadic the user may want to perform a manual addition in such case the user may enter the spa control menu and confirm an addition add the addition operation turns the system on immediately and operates.