Thank you PoolDoc for the info.

No, my pool company never promised chlorine-free sanitation. They did promise that my pool will need less chlorine (maybe 1/4 or 1/5 of the regular amount). So I do have chlorine which as of right now I am keeping at 0.5. The ozone generator that they installed is completely standalone (not plumbed into the filtration) with the tube running to the bottom of the pool where ozone is released into water. The idea is that generator which draws only about 20W runs 24/7 and thus provides additional sanitation. I like the idea but I do not like the implementation - as I said it is noisy.

Correct me if I am wrong but from what I read ozone by itself is not supposed to affect the pH or alkalinity in a negative way. Is this right?

I will keep you guys posted as per the resolution of the issue. So far my pool company treated me very well and I am hopeful they will be able to resolve the issue to my satisfaction. I understand they would not want to take it out or replace it with the different product, but I will keep pushing them. Their suggestion so far is to not run ozone generator 24/7 (which is the easiest fix from their side) but I don't like this as a "solution". It is just a workaround.

-Nick