Question on H2O2 drops: Say I wanted to ass 1 drop of 35% H2O2 to 8 oz of CS. Is this is the same as putting about 11 or 12 drops as 3% H2O2 (i.e. 35 divided by 3)? Also, does it need to be food grade, or is the stuff form walgreen's okay?
Thanks, ~David

