I keep hearing that BLIX is bad but in some areas in this world that's all you can get without a lot of hassle. Note, that diluted BLIX (or bleach or fixer) is a lot weaker than undiluted version therefore I would at least double bleach time to be on the safe side. Since it's E6 you are trying here, any residual brown stain from incomplete bleaching should be very obvious and can be treated with another batch of correctly mixed BLIX (or bleach and fix) days or weeks later if necessary.