If this is an auto , you're screwed ....
Since you flushed ( which only breaks up salt ) , continued flushing will LEACH the soil of important amendments. Leave alone UNTIL pot goes dry ( that will be a while ) since LED grows do not make plants transpire as much.
Damaged , crispy or burnt leaves WILL not recover. Only the fans that may be droopy only will bounce back. DO NOT PULL ANY LEAVES WHILE SHE IS THIS STRESSED.
Just let her come around on her own.
The worst damage most growers do .... Is HOVER over your grows.
Wait a few days as pot dries out .....
If plant DRINKS ... Then it may come back.
If plant DOES NOT and pot remains just as heavy since watering .... Rest in peace.
Flushing can screw shit up too ... It smothers the roots ( drowning )
One simple " water flush " up to normal 20% runoff is enough to get salt problem corrected. But running multiple gallons over and over again , just strips the soil.
One good watering with 6.5 is enough. There is zero reason to " check " runoff.
Most good potting soil is PREBUFFERED ... Even if you use tap ...
Bag soil makers assume most gardeners are using TAP WATER for their gardens and shrubs so they are designed for the home gardener that way. So using RO or distilled is ridiculous... Since all bagged soil is gonna be used at home using the home owners OWN local water source.
Example : FFOF is buffered at 6.3 - my tap is 7.0 ... I don't do shit to it , I mix my Nutes by PPM requirements only , and water in plant. PH to 6.5 is so plant can have ALL available nutrients available.... Nothing else.
So ..... Patience.
If it looks to getting better , then you can correct what you did at next watering or feed.
If it does not ... It is done ... Start over. A stunted plant will not be worth the light , Nutes and time. Start another one now as plan b.
