Our local Pinch A Penny will fill the reusable 2 1/2 GL jug for $4.50 at 12%HC. We pay almost $2 for 1GL clorox. Would it not be better for me to buy the clorine at the pool store and not use regular bleach? All the other products at the pool store seem high but for the chlorine it is cheaper I think. Any help would be great.