Niacin does nothing to help pass a U/A. Its an old urban myth.
Sonne #7 also does nothing to help pass a U/A, Its the water thats consumed with both products that allows people to test negative.
Other than that, there is no product that can rid the body of THC. Only time and fat burning exercise can do that.

Bleach will be detected if a specimen validity test is run on the sample.

You would be better off using N2's Dilution technique (see the 'sticky' thread) ....and PRAY!