asked 16 August 2017 asked by Robert_D (19700 points)
We use Liquid Ammonium Sulfate as the chloramination agent which is dosed based on the free chlorine prior to injection. Its based on a 4:1 ratio of free chlorine to active ammonia. I have plants that run at 7.0 and up to 8.5 with little effect from ph. We test monochloramine vs total cjlorine where these need to be as close to each other as possible and try to have a trace of free ammonia. Also, check nitrites and nitrates periodically in distribution. An example would be total chlorine of 2.00 with 1.90 monochloramine is good with 0.1 free ammonia. The other species will give you taste and odor as an indicator as well. Hope this helps.