Is it milky or murky? There's a big difference. Milky is due to suspended particles. Cal-Hypo is notorious for causing that. It actually should not affect the swim-ability of the water.

But if it's murky you are fighting something and you need to shock your pool as specified.

If it's milky, try using skimmer socks and adding some PolyQuat which can act as a clarifier as well as an algaecide.