I have been using chlorine for 19 years with 4 diffrent pools with pretty good results, however this year I ran into trouble and found this site. I am learning the ropes of doing it the correct way versus just throwing bleach in, when it tests low on cheap teat strips.( I will be buying the right kit soon). any way in the past I would punch holes in a full bottle of bleach and tie it to the ladder when I was going to be gone for a weekend. Not sure if it did any thing but I always came home to a clean pool. Any thoughts on this?