Found this tidbit online. Is this possible? I know phosphates aren't a problem if the chlorine level is in the proper range based on the CYA level, but if they can affect the output of a chlorine generator, then keeping the chlorine at the right level becomes that much harder.
"Q: Why are phosphates even more problematic for chlorine and bromine generators?
A: Filming of the electrode media…
Phosphates are known to bind to the cathode of chlorine and bromine generating electrode cells causing a reduction or elimination of bromine and chlorine production, rendering the pool or spa unsanitary. "