Quote Originally Posted by abadubs
the local family run pool store owner gave me the scenario of liquid shock vs ultra clorox. I don't remember the specifics, but the shock was at least equal in price after you make the percentages equal, but needing much less of it thus less hassle, carrying heavy bottles from store, and less landfill.
The 10 or 12% in the liquid shock from the pool store is less stable and will lose its potency faster than the 6% bleach from the grocery store.

Sometimes I do buy liquid pool shock from the grocery if I'm going to use it right away or store it less than a week or so. However, the pool store up the street stores big pallets of liquid pool shock outside in the heat. There isn't any way I'm buying that stuff.

Just be aware that you may be paying more but not really getting that extra percentage. Ask him how fresh his stock is, it may be worth it to buy liquid shock from him. Then again, if you don't notice that you have to use less, it probably has lost some of its strength.