dosage for 17,5% Hydrogen Peroxide

Hello,

I bought Hydrogen Peroxide on Ebay. It is only 17,5% and not 35%.

The protocol I have is for 35%, so I guess I'm going to use the double dosage.

Actually somebody with knowledge about it told me to use the dosage of the 35% protocol. He said the stuff is quite strong.

This will be the first time I use it.

So my question is should I use it like it was 35% or double the dosage.

Thank You.