At the enod of season last year I was having a hard time keeping bromine in my 24,000 gallon above ground pool. Before opening this yeat I replaced my old cracked filter witha new 22" hayward sand filter. I drained t2/3 of the pool water and refilled the pool.
I shocked with six pounds of nonchlorine shock.
After running the filter for 24 hour there was no bromine. I checked to be sure the bromine dispenser was working properly which it seems to be.
Adding a pound of bromine in the skimmer basket failed to bring the bromine level up.
PH and alkalinity are good and the water is crystal clear. I am totally confused. I hope someone can enlighten me.