I took a water sample and was told combined chlorine is to high . they told me to add 18 lb of alkalinity booster. then add hardness increaser.then add 4 lb of shock with or without chlorine.does this sound correct since the combined is high now.
The shock is certainly appropriate given the combined chlorine situation. The alkalinity booster and hardness increaser are not directly related to the combined chlorine and are likely addressing low alkalinity and hardness levels in addition to the combined chlorine problem. As far as the amounts go, that would depend on the size of the pool and the amount of water being treated.
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