Biz? Biz!
Am working through a huge case of the coin vend sized boxes of the old Biz (in the blue box, made by P&G). Stuff rocks when it comes to stan removal, whitening and brightening.
Wasn't impressed with the first offering after the brand was sold off, and never tired it afterwards. Created too much froth, contained too much fillers for the powdered packet size, and the sweet bubble gum scent was the final straw.
Biz, at least in it's final incarnations from P&G was closer to a detergent than just an all fabric bleach. According to the ingredients listed on the box/case Biz contained water softeners (Zeolites and washing soda), along with protease, surfactants, oxygen bleach, bleach activator, and so forth.
So if one is using Biz in the wash, then dosage of detergent should be adjusted as well.