I've mentioned in a couple of posts on here that we've installed some pretty high end (read $$) UV systems in our indoor pools. The folks who install these systems swear that they don't eat free chlorine but all of my pool sense, and other indoor facility operators, tell me otherwise.
Isn't UV from the sun what is responsible for the higher chlorine demand in outdoor pools?
These UV systems virtually eliminate Combined Chlorine levels but, obviously they aren't smart enough to know good chlorine from bad, if they remove one type surely they'll remove any type good or bad?
I can attest to our chlorine demand rising at all of our locations since installing these systems, despite what installer man wants me to believe. What I'm looking for is another opinion that, if I tried adding and maintaining a CYA level of about 20-30, even though these are indoor pools, would I expect to see the Chlorine demand drop and what are the possible evil side effects of this CYA?
Our pools are primarily chlorinated with ORP controlled commercial SWGs with the occasional (more often lately) boost with Cal Hypo as needed to maintain FC levels.
Thanks in advance