I, too, loooove the feeling of a nicely nuked tank!!!!
I usually set up the tank with the pp, fill the tank up all the way and set the filter running. Drop the net and Python, etc, into it. I would let the tank/filter run for 4 hours with the PP. Take out your Python after 5-10 minutes. It will discolor the plastic a bit - make it brown! PP will not discolor your silicon in the tank corners, though - unless it is scarred and full of algae (this will turn brown).
Rub the tank down after and rinse well. Then set it in the sun for the sun to bleach anything that was killed but not removed. You can run bleach up the seams if you have encased dead algae in the silicon, etc, but for disinfecting, that will be overkill.
Bleach is very useful, but must be deactivated or completely rinsed. PP is not harmful to the fish in reasonable amounts - so if there is some left it makes no difference. (there is no reason why you would leave it - but you can feel comfortable that if, for some reason you miss a bit no harm will come to the fish).
As cheap as bleach is, pp is much cheaper for it takes soooooooooo little. I have a bottle from Merck Labs - it is over 40 years old and still going strong!!!!
I agree - have fun!!! In fact - post up a picture! I truly do get pleasure from seeing a tank get squeaky clean!!!!
So sorry for your boyfriend -

- tough luck -

: His loss is your gain!!!!