dayday1 Posted February 25, 2021 Report Share Posted February 25, 2021 So yesterday at 4:40 I got my tub up to 9.5 ppm This morning at 9:10 am I have a reading of 5.5 ppm So 4.5 ppm 16 hours I lost 4 ppm I have 0 CC drop test checked FAS/ DPD I believe its called. With the powder My question is would that be a normal loss I also have ozone. Or is that a sign I should super sanitize it. Thank you Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted February 25, 2021 Report Share Posted February 25, 2021 That's what ozone does. Quote Link to comment Share on other sites More sharing options...
dayday1 Posted February 25, 2021 Author Report Share Posted February 25, 2021 I kinda figured that but wasn't sure how much ozone does. That almost half the amount of sanitizer in 16 hours is that about right?? Quote Link to comment Share on other sites More sharing options...
RDspaguy Posted February 25, 2021 Report Share Posted February 25, 2021 Couldn't say. Every spa, ozonator, and control system is different, and most people with ozone aren't trying to keep a high chlorine residual. It is hard to do (as you have seen) and defeats the purpose of having ozone to begin with. 3 Quote Link to comment Share on other sites More sharing options...
waterbear Posted March 3, 2021 Report Share Posted March 3, 2021 IF you have 0 ppm CC then yo do not need to shock. IF CC is 1 ppm or higher then shock. If you have ozone best practice is to test chlorine after using the tub and bring it to the proper range for your CYA level (for example, If CYA is at 30 ppm add enough chlorine to bring it up to 4 - 6 ppm, if below 30 then 2-5 ppm. If it's above 60 you should drain and refill and read about the dichlor/bleach method on this forum) The ozone will lower your FC the next time youuse the tub it but your water will be ok, Quote Link to comment Share on other sites More sharing options...
ciderjack Posted March 4, 2021 Report Share Posted March 4, 2021 On 2/25/2021 at 9:11 AM, dayday1 said: So yesterday at 4:40 I got my tub up to 9.5 ppm This morning at 9:10 am I have a reading of 5.5 ppm So 4.5 ppm 16 hours I lost 4 ppm I have 0 CC drop test checked FAS/ DPD I believe its called. With the powder My question is would that be a normal loss I also have ozone. Or is that a sign I should super sanitize it. Thank you Yes, that is normal. Getting your spa to 3-5ppm after use and then having little to no chlorine 6-12 hours later is the goal. Quote Link to comment Share on other sites More sharing options...
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