This is the kit I bought...
http://www.amazon.com/gp/product/B00...ef=oss_product

I added 1.42 gallon bottle of bleach to the pool. I added a little bit at first and then a couple of hours later I checked the level (with a strip), but the color wasn't a bright purple for a high level so I added the entire bottle. I will check it in the morning to see what the level is.