DiChlor or Bleach?

JH77

Member
Jun 12, 2019
9
Southern Maryland
Question: Does Chlorox 4-in-1 pool shock definitely contain CYA? I can only find Dichlor specified on the ingredients.

Also, what is the difference between 6-in-1 shock vs 4-in-1.

It says (on the 4-in-1 packet) that it's specifically for vinyl liner pools and won't bleach your liner. Is this just marketing BS or is there something to it?

Thanks!
 

mknauss

Mod Squad
TFP Expert
Bronze Supporter
May 3, 2014
22,404
Laughlin, NV
Dichlor is CYA and chlorine. Essentially one part CYA to one part chlorine.

The packet is marketing BS.

Use liquid chlorine.