I’m maintaining this commercial spa that gives off a combined chlorine smell, when I test I see that the total chlorine is the same as free chlorine meaning there shouldn’t be combined chlorine (using Taylor k-2005). I continuously maintain the proper fc to cya ratio. I do a drain and refill every two weeks to make sure cya doesn’t go off the charts because there’s a trichlor tab feeder. Just a couple days after the refill I’ll start to get the smell again. Should I just accept that public pools and spas might sometimes give off weird smells even with no detected cc? It’s inground, 1,800 gallons with no cover. Any chance it could be biofilm in the plumbing? Pipe diameter and sand filter are the same size used for 20,000 gallon pools, not even sure if a spa purge product would be applicable for that.
FC-5 in morning peaks to about 8-10
pH-7.5 to 7.8
Cya-60
Ch-180
Ta-100 to 120
Temp-103 to 104f
Thank you.
FC-5 in morning peaks to about 8-10
pH-7.5 to 7.8
Cya-60
Ch-180
Ta-100 to 120
Temp-103 to 104f
Thank you.
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