H202 will not kill the nutes though.
But the wrong dose at the wrong concentration could sure make them unhappy
I use food grade 32% H202, and dilute it 11:1 with water to make it at 3%.
Bottles that are already mixed to 3%, usually contain other chemicals as stabilizers so the H202 doesn't turn to water immediately. They aren't necessarily bad for plants, but I don't like it.