How much liquid chlorine to add into a pool with algae to shock it?

  • Last Post 08 August 2021
glockssss99 posted this 07 August 2021

I have a 14,000-gallon pool that is a little cloudy with algae. I'm wondering how many 12.5% sodium gallons of chlorine I should add to shock it overnight. I bought 8 gallons today. The pool guy said to add all 8 gallons of chlorine, but I feel like that's too much for a 14,000 gallon pool.  

JCMC70 posted this 08 August 2021

You are correct. 8 gallons is too much. But I can't tell you how much to add without knowing what the stabilizer level is in the water. It would be even better if you could provide the following information:

Above ground or in ground pool?

 If in ground, is it a vinyl lined pool, a plaster/gunnite pool, a fiberglass pool?

Current readings for:

Free Chlorine 

Combined Chlorine or total chlorine 

Total Alkilinity


Calcium Hardness 


Do you use a Salt Water Generator to chlorinate the water?