Wonder if anyone can help me with this issue. We have an indoor pool which is covered most of the time. It is not used every day. We have a Nature 2 Cartridge and Chorine Tab Dispenser. The CYA levels were off the charts so I stopped using the Chlorine Tabs. We changed the water but CYA levels became elevated again. The pool guy told me to use Chlor Brite because it does not contain stabilizer but in fact it does. So I switched to Lithium Hyperchorite but CYA levels are still high. So far have only had a couple of issues with algae but seems to be under control.
When we re-built the pool we considered a salt system but were concerned about corrosion of the duct work used in the HV/AC and dehumidification system in the pool room. I've read about Liquid chlorine which seems to be the answer but not really looking forward to adding liquid chlorine all the time. Any ideas??