here is a good question...What kind of medium/method ar eyou using? How are we supposed to give you an educated answer???

Like snoop said. In rockwool, It is probalby a real bad idea! In a res', It might be a good idea...

Honestly, I have to research that just to get some other opinion's, but,
I will add: DO NOT ADD H2o2 to ORGANICS, EVER!!!
h2o2 does a great job of killing bacteria in your CHEMICAL
Nute regimen...but KILLS ALL Bacteria, including...what we like to call...BENEFICIALS.

sorry, but I always like to warn you guys/gals about the
1st pro-con of H2o2...later.lw