KMart is having a sale on 182oz of American Fare chlorine - 5 bottles for $10. This appears to be a great sale - cheaper than Sam's Club, the cheapest I've found. The only problem is that the American Fare chlorine bottle has no markings on it regarding the chlorine percentage or if it has other bad things in it you wouldn't want to put in your pool.

Does anyone know if this chlorine is okay for the pool, and its percentage of chlorine?