Difference between HTH Shock N Swim and Super Shock N Swim?

JasonLion

TFP Expert
Platinum Supporter
LifeTime Supporter
May 7, 2007
37,880
Silver Spring, MD
HTH Shock N Swim is 45% cal-hypo. Super Shock N Swim is 53% cal-hypo. The super version has almost 18% more chlorine per bag.
 

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