It seems like last season my chlorine bleach wasn't as effective as usual. I actually have a paper cheat sheet I made years ago tailored to my pool that tells me how many ounces of bleach to use to raise the free chlorine x parts per million, where I have a column of values for x, varying in increments of .5
Well today when I bought bleach I thought to double check the active ingredient, and it says 6% chlorine. I kind of think it used to be 8.25%, so I went to the math page on this site and compared it to my cheat sheet, and behold... I do think my cheat sheet is based on 8.25% chlorine.
So I think my local store (H.E.B. grocery store) has weakened their bleach. Both generic as well as clorox brand are at 6%. Maybe Clorox always was, for all I know, because I always buy the cheap brand.
Oh well, I assume that 6% is okay, as l long as I account for that in my pool math.
Well today when I bought bleach I thought to double check the active ingredient, and it says 6% chlorine. I kind of think it used to be 8.25%, so I went to the math page on this site and compared it to my cheat sheet, and behold... I do think my cheat sheet is based on 8.25% chlorine.
So I think my local store (H.E.B. grocery store) has weakened their bleach. Both generic as well as clorox brand are at 6%. Maybe Clorox always was, for all I know, because I always buy the cheap brand.
Oh well, I assume that 6% is okay, as l long as I account for that in my pool math.