how much 6% hydrogen peroxide will i use?

i know iknow!!! i should use stonger stuff but just cant right now... thats why im asking... i have 6% and a 100L tank hydro set. how much should i put in.. also is it really worth doing? my water is about 15 degres i havent had any problems just started flowering 2 weeks ago, so i dont want to get any problems eather thats why i was going to put the 6% hydrogen peroxide!. also im told it adds agreat deal of o2 to the water as well that has to be good... any info would be great

anyone????

If using the 29% H2O2, I use 3ml per gallon twice weekly. So if your looking at 6% H2O2, you should use 5 times as much.

Here is everything you need to know, just double the 3%