CYA is only in the water when we add it. Your best bet is to use the PoolMath APP (Effects of Adding Chemicals) to determine what will happen when you dose with any chemical. Good to hear you go the CYA down, but the water shouldn't just be cloudy. Watch your FC to CYA balance per the FC/CYA Chart. If the cloudiness doesn't go away, consider doing an Overnight Chlorine Loss Test to rule-out algae.