According to your dosing of your 35% H2O2 solution of 2ml per gallon .
Therfore to have same strength solution using 3% H2O2 one should use 23ml per gallon (35 divided by 3 =11.66666 x 2ml) If I'm not mistaken!
here is a link on what growth technology say on the subject.
http://www.abergreen.co.uk/images/pd...structions.pdf
As i understand it your 2ml/gallon dose of 35% H2O2 is a good maintainace dose.
For killing infection already there, a dose of 8ml/gallon(35%H2O2) should be the one to use.
I think:wtf: