For more information please ask on the forum.Īcknowledgment: The original Chlorine/CYA “Best Guess” chart was developed by Ben Powell. The reasoning for using CYA indoors is quite different. This may be due to the high chlorine level within the cell.įor indoor pools we recommend CYA between 20 and 30ppm. Most saltwater chlorine generator (SWCG) pools appear to remain algae-free at a lower minimum FC level compared with the minimum FC column for manually dosed pools. At CYA levels over 80, a partial drain/refill to lower the CYA level is usually required before you start the SLAM. At very high CYA levels it can be impractical to reach such high FC levels. The shock levels shown have equivalent effective disinfecting chlorine amounts. To learn more about SLAM please click to learn more. Users with a green or cloudy pool will use this chart to increase their chlorine level to SLAM their pool.
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