Since you have a salt-water generator, I would say you need to get your CYA to about 60 (or what the manufacturer calls for). You can shock with the dichlor or even tri-chlor powder at this point.

But you'll have to get your FC to 15. It will never clear at 3

As for pH: if the FC is below 10, then if it's high, you need to bring it down (Dichlor will do it , but trichlor will do it faster.) If FC is around 15, you only can reliably say your pH is high if it's reading 8 or higher. In high chlorine situations, pH reads high.

Carl