Now, this should be a very simple question, but the problem is that I live in the middle of nowhere. There isn't a Sally's, or even a drugstore that's independent from the supermarket. What is the best bleach that I can either order online or get at an ordinary supermarket?

Where do you live?

Southwest Colorado. Tiny resort town, 4 hours away from each of the nearest medium sized cities.

Anything by L'Oreal or Herbal Essences has always worked just fine for me.

Thanks, I'll get one of those. I'm sure they have those brands here.