Ugh, I used to grab the cheap stuff without a second thought. Ruined a whole batch of color last year with clumpy powder like that. Honestly, you just can't skip on quality for bleach.
Disagree hard on this one. I've mixed cheap bleach powder for years without a single clump, @gonzalez.vera. You just have to sift it first and mix slower with cooler water. That batch last year sounds more like a mixing technique issue. Sometimes the expensive brands just add fancy packaging and a higher price tag for the same basic ingredients. I saved a ton on my last project using the budget option and the color came out perfectly even.