http://www.using-hydrogen-peroxide.c...-peroxide.html

This stuff is 12% concentration Hydrogen Peroxide.

Handle with care. Wear eye protection.
The stuff will burn you chemically.

Dump a little in the tank, swish it around and check it 24 hrs later.

Cautions listed: strong oxidizer, causes irritation, effects may be

What's that going to do to aluminum and steel?