#1. Concentration – How many gallons of water does one bag treat?

#2. pH of the shock – How it affects the balance of your water.

#3. Application – How it’s applied; either broadcasting or pre-dissolving.

#4. Non-chlorine, chlorine, or stabilized chlorine.

The first shock is lithium hypochlorite. One bag treats 10,000 gallons. The pH is 10.7, reducing the need of pH increase. It’s applied by broadcasting over the pool surface. It will not bleach the liner. It’s unstabilized – apply at night and you can swim by 3 pm the next day.

The next shock is dichlor. One bag treats 8,000 gallons. The pH is 6.7, essentially neutral. It’s applied by adding directly to skimmer at night. It’s stablilized and cyanuric acid levels should be monitored.

The next shock is calcium hypochlorite. Once bag treats 7,500 gallons. The pH is 10.8, reducing the need for pH increase. It’s applied by pre-dissolving in a pail of water and added directly to pool at night. It’s unstabilized.

The last option is potassium monopersulfate. One bag treats 10,000 gallons. Te pH is 3.7, for every 3 lbs add 1 lb of soda ash. Apply broadcasting. Non-chlorine; swim immediately after application.