Which of these two are the % that actually matter. A local hardware/lumber/farm store has 10% liquid shock for $2.50/gal, and I am wanting to compare the cost of that to the cost of the bleach at walmart. The bleach says 6% Sodium Hypochlorite, but I think it also says 5.25% available chlorine. So please tell me which of these is the percentage that matters when it comes to putting chlorine in my pool. Oh and also the 10% liquid shock says available chlorine of 11% if I remember right. Thanks in advance for all your help!!!!