I was browsing around on the internet, and I came across a thread where someone recommended using reverse osmosis to filter out calcium from pool water, and they warned that it would also remove CYA in the process. My knowledge on reverse osmosis is somewhat limited, so I'm hoping someone here might be able to confirm this.
I'm thinking that if this could work, it might be an option for treating some of the pools I run into that have accumulated CYA and still rely on tablets for chlorination.
Most of the RO systems I've seen are 5 stages. Do each of these stages remove different types of impurities? Would I be able to take one or two stages to remove Calcium and CYA?