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first 24 hours. Put the cover on and allow the spa to heat to desired 17. temperature. Adjusting The Proper Bromine Levels After start up, decrease the filtration cycle to F-4 1. and monitor the bromine level until it is within the recommended range. Use bromine test strips to achieve a 3-5 ppm 2. recommended level. Note: It can take several days for the bromine level to stabilize because the fill water that was used sometimes contains contaminants that need to be neutralized, thereby using up t