Spa chlorine loss


Well-known member
Nov 8, 2015
Boston, MA
400 gallon hydrpools w ozonator

FC 0
TA 90
PH 7.5
CH 180

this is a new tub and I can’t get it to hold chlorine. It got real cloudy so I brought it up to school level last night and kept adding chlorine to keep it at 14 ppm.
11:30 last night FC 14ppm
6:30 this morning 1ppm (it is much clearer though


Jun 8, 2016
South Carolina
Sounds like you still have something burning your chlorine, but I find that in my swim spa the ozonator burns off about half of my chlorine each day.


TFP Expert
Bronze Supporter
In The Industry
Aug 10, 2017
Morris Cnty NJ
That's the deal with ozone, you slam it with some chlorine and the ozonator eats it up for you. Keep adding heavy for a day or 2 amd it should clear and ne goos to go
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