You should look at oxine and the bio cide type products. The have EPA C label that stronger in requirements. We used something like it in our coolers and in our irrigation water. It is essentially a chlorine. They are one the site @Farmer_Dan, had a great comparison photo. Use it for the Irragation lable. I would rather deal with Cl in a grow than H2O2. H2O2 for me has been a problem in grows.
Look at this point Look at Tom’s chart
From the voices in my head
Ethan 