Check out my post at the bottom of this thread: Understanding Bleach Degradation - #6 by CFH
Home Depot - if this is your only source, be sure you are getting the Chlorinating Liquid in the pool section. Comes 3 gal to a case and is rated as 10%. Buy 4 cases and they take $1 a case off.
My comments at the bottom of that thread assume all things relative - Home Depot is actually 10% and the Pool Supply SH is actually 12.5%. In my area, we do not have reasonably priced SH suppliers. Amazingly, Home Depot 10% is the best value, again read the comments on that thread.
