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 or boost the addition operation turns the system on immediately and operates the specified amount of time determined to elevate the chlorine level by 2 ppm this depends on bather load and time and cannot be guaranteed if the water is overly polluted such that the actual bather load far exceeded the anticipated bather load a manual dichlor mps dose may be used and is compatible with the system typically the spa will require a monthly manual shock with mps or dichlor to eliminate any accumulated waste the oxidizer level should be brought to and held at 5 ppm while all jets configurations and pumps are operated for 30 minutes each it is important to monitor ph at this time as well to ensure that the water remains balanced over time the water level in spa typically drops from evaporation or splash out when fresh water is added to the spa it is important to rebalance the water and monitor the salt concentration the system may employ a conductivity sensor to determine the amount of salt in the water and whether it is too high or too low a water care icon may be arranged to blink to indicate that the salt is low and that more salt is needed.