President 47_AK47

Hello So my first thought was a magnesium deficiency, because of the striped look with green veins. However if you're spraying anything on your plants, or doing a foliar feeding the best plan is doing it as lights go out, because most things will react badly once they soak in hours of light. I used to mist my plants with water to boost the humidity in this young stage and because i didnt let the chlorine evaporate out over a few hours that too can burn your leaves. Like someone also mentioned though definitely be checking the ph as that can give a lot of these leaf symptoms too. And if by chance the leaves do continue to get that striped appearance, consider starting a calmag supplement every week. Happy growing, keep trying and also keep it simple. ✌️

That look like a ph fluctuation issue, make sure your ph pen is adjusted properly in order to keep your ph in check .

Will it be a good idea to flush plants with clean water, think it mite be nute burn

How much phosphorus have you fed them.👍👍 From The White House.

I'm with gmslave on this one.. Those look like older leaves. Remember they won't ever "repair" so you have to look to the new growth to see if your problem solution worked.. which it looks like it has. Happy growing! 👊