Today there was a thread asking about using iodine as a sanitizer, which made me search other similar threads. I found one in which chemgeek mentioned that bromine is not bound to CYA like chlorine is. That got me to thinking: for pools with unmanageable high CYA that can't be drained, for example currently in California due to the drought, would it be feasible to turn the pool into a bromine pool for sanitation, as it is not affected by CYA? Then once it is possible to drain and refill go back to standard chlorine?