Hi -
I am a first year pool owner - having bought a house with a 10-15 year old inground Chlorine pool.
I'm figuring things out but I have a recurring issue of when I shock with HTH Extra Shock (75% hypocalcium chloride) - I end up with a whitish cloudiness in pool which takes a few days to clear. Any idea why?

Pre-shock values:
Size: 70,000 L
Chlorine source: Hypocalcium chloride in form of HTH capsules in skimmer (stopped using tichlor to arrest the CYA build up)
Sand filter with heater
Free Chlorine - 2.92 (usually around 3-5ppm)
Total Chlorine - 3.51 (thus the need of shock)
Total alkalinity - 120ppm
Calcium Hardness - 170ppm
pH 7.6
CYA 44ppm (started at over 100 and dumped half the water and still trying to get rid of more with backwash and fresh water...)
Cu+2 - 0.3ppm (used to be over 1.0ppm due to heater fried previous year - wroked hard to get levels down)

SHOCK -
Brush sides of pool added 2 capfuls of Metal-free (to keep Cu+2 in solution)
1 bag of HTH Extra shock

CLOUDINESS - whitish

Thanks for any help

Connie

Chlorine went above 10ppm