H2o2 will cause the leaves to get brittle
and turn a coppery greenish-yellow color.
There might be some blisters.
Growth will completely stop when this happens,
while the plant tries to repair the damaged roots.
If the plant is mature,
then you should harvest it,
because it will not add anymore budz.
How do I know this?
'Cause I done it also.
Flush it for as long as you can wait,
with plain RO,
and then chop it and start over.
Try to avoid H2o2 if at all possible,
and then the max dose for 35% h2o2 in RO
should be 2.5ml/gl....... if you must!
Dutch Master states on their web site,
that H2o2 will ruin the result,
and not to use any amount.
If you are using this band-aid,
to try to fix your hemorrhaging,
it will fail, or greatly reduce your yields.
Please try to grow without H2o2.
Use it for cleaning your stuff between grows.
I wash my fresh fruits vegetables with a mild H2o2 solution.
Keeps them fresh longer, especially grapes.
Get the temp of your rez under control,
and you won't need H2o2.
.