Grib Posted July 29, 2022 Report Share Posted July 29, 2022 I have an oaisis rx170s I've had a week now. I put chlorine in and test strip is OK. I then top up the pH up. But next day the chlorine levels have dropped to low. My hot tub is indoors should I need to top up chlorine everyday Quote Link to comment Share on other sites More sharing options...
Couch67 Posted August 7, 2022 Report Share Posted August 7, 2022 If the chlorine is continually dropping, its likely that you have a biofilm buildup in the plumbing, and require a decontamination. Your other thread about the milky water is another sign. The decontamination sticky in this forum is a great how-to on how to resolve this. One other suggestion - its highly recommended to get yourself a Taylor test kit (K-2006 for chlorine), these are much more accurate than relying on test strips for balancing water. Strips are good for a quick test to see if you are in the ballpark. Quote Link to comment Share on other sites More sharing options...
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