leaves turning silver please help indoor grow, pest problem?

1) started as white powdery substance on side of rockwool cubes
2) next the leaves started to turn silver
3) now some leaves near the bottom are turning yellow and dying

I changed the nutrients to include 5.5 ml (aquaflakes A&B), root excelerator, liquid karma, and multi zen. switched from MH lamp to fluorescent, increased air flow, tried spraying the leaves with 1:9 skim milk soln and 1:4 hydrogen peroxide...nothing has worked. does anyone know what this can be? this is first grow could really use some feedback. these are zambezi autoflower strains
Is this a nutrient or pest problem? Mildew?

Looks like light glaring off the leaves to me lol

no its actually silver and will not rub off, i turned off the light and its still there, do you think its a nutrient problem? Ph? the ph of the nutrients was 5.5-6.5 when i tested

looks like some kind of mold on that cube.

could be mold or powdery mildew due to over-watering and high humid dirty environment.

soak the cube in water with a little bit of diluted 3% hydrogen peroxide. then soak it again in a fresh clean solution. then shake it out good and put it on a fresh clean dry sponge. The sponge will draw out the excess water

how should i go about treating the leaves? the hydrogen peroxide spray did not work

try physically rubbign it off with a sponge or paper towel with the hydrogen peroxide

leaf damage is irreversible.. the way it works.. is . take care of the issue.. and your New Growth will show your progress..

should i clip all the dying of infected leasves?
heres what some look like now...leaves are turing yellow ffrom the inside out. could the mildew be in the roots? will it spread to other plants now that they are in DWC? thank you!
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