Do i need h202?

I see lots of hydro users using h202. Do i need this? I'm going rdwc with GH flora nutrients. 6 pot bubble bucket system under 1000 watt light in a 5 by 5 gorrila tent. just wondering if this stuff is mandatory? Ill be using ro water also. Seen videos of ppl using it in hydro set ups. And also read ppl use it on here. What's it for exactly? Help a noob. Thanks

You've invested all that time and energy into the setup and DWC and you don't even know what h202 does? It makes everything sterile.