i have no idea... but I just wanted to say I love hank hill. I think a little hydrogen peroxide goes a long way. I've read its pretty easy to kill your plants using it. Someone else should know more.
That wont be enough the 3% grade as you will need to use it at 6:1 every 4 days so you will need gallons of it. Search around for more concentrated amount such as 29%grade (60:1) or 50% grade (100:1). Only use in hydro systems.
um... I've never used H2O2... so I have no idea what I'm talking about... and this isn't my thread, so I don't know why I care... but when you say 6:1, 60:1, and 100:1 you mean water:H2O2? way more water than h2o2 right?