Quote Originally Posted by gagan View Post
Thanks Toybuilder and JimK.

On the same line, I was at walmart and saw this item in my local walmart: Pool Essentials Chlorinating Liquid.
It has 10% Sodium hypochlorite... So I assume stronger bleach. I haven't seen this mentioned before... Anyone thought on this?
That new one at Walmart is labelled at 10% while the one at Costco (Clorex) is labelled 8.3%. Despite the labelling the Clorex is about 14% stronger than Walmart. I determined this by filling 2 buckets with 2 gall of water ea and adding the same number of drops of CL to each from Walmart and Costco. Using a Taylor droptest kit the free cl from the Clorex bucket was 3.5 ppm whereas the Walmart bucket came in at 3.
This brings the effective prices to $3.50 gall from Costco and $2.84 from Walmart after adjusting for the actual strength difference. I find Costco more convenient as there are 3 jugs to a box so it makes transport and storing easier.