juice fast for pancreatic cancer

Hey

my mom is going on a 3 days veg juice fast as recommended in the PH miracle book.
I have few questions
1.can i replace the hydrogen peroxide or the aerobic Oxygen(which i cant get in israel)
with ozonated water i make in my ozonator ?
2.Why does he recommended 4 liters of water ?
3. how much water to juice should we use ?
4. Im also planing to do it without any supplements, do u think its a bad idea ?

i will apriciate any advice or help.

thanks so much

ron.