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Doesn't red orange signify low pH. Your title says PH won't go down yet you are adding pH up? I am confused. I assume that the soil has fertilizer already in it? And that you are trying to get the runoff into the lime green?

They're in budding cycle so they will stop growing shortly. When you switched them to flower they would put on a growth spurt, thats normal. The 400w would be good for flowering though.

Should be fine to leave it at 850 then if that is the case. When you increase the watering regularity you are also increases the amount of nutrient being delievered to the roots. Sometimes plants will react to that, and the solution is to drop the EC slightly to compensate. 3 times a day...

It is easy to overwater small plants in large blocks of rockwool like that. Once the plants double in size they will have no problems drinking all that dry 3 times a day, but not at the moment. As suggested cover the rockwool, and run a cycle through of hydrogen peroxide to kill any fungus and...

What was the EC at when you were flooding 4 times a day?

Whats the humidity in there when the lights are on?

They need repotting into their own pots. Are you flooding that tray? Reason I ask is that they look a little like they've got salt build up which is unusual for such young plants, but not unusual if you are flooding the tray rather than top feeding them. Give them their own pots and water them...

Probably best to water them three times during the light cycle. The other factor that can cause wilting like that is the temperature of the roots. If that gets too warm that can cause wilting. The third flood cycle closer to lights out is like a cool down for them. What is the EC you are...

Bugs will find their way in without much assistance. A grow room is nirvana for bugs. Fungi on the other hand love humidity. Without a constant extraction and exchange of air the humidity will rise and fungi which is in all air, will spread over plants like wildfire.

Did the symptoms appear before or after you decided to switch to budswel.

A PPM of 580 is not overly high, but it depends on how many times you are running your watering cycles. How many times a day is the pumps coming on?

Tell us a bit more about your grow setup. Lights, temps, air etc.

Not all aquarium LED lights will work on plants. In the end your plants still need a certain level of light pressure (lumens) and the correct or close enough to correct light spectrum. Also growing from seed is still a numbers game and it can be a mistake to think that every seed is going to...

Is your grow room light tight. They look to me like they are trying to reveg.

Just remember to let the pots dry out between watering and let that determine when to water them next rather than some arbitrary number someone gave you.

They look about 2-3 weeks into flower - probably heat issues, heat stress. - probably spider mite damage, - over watering, - not letting the soil dry right out between watering, - looks like air quality issues too perhaps, is there an air intake into that room, and what size is the...

Over watered, stressed from playing with the light cycle etc etc. These are seedlings, they need routine, precise routines. It might take a seedling that size in a pot that size, about a week before it needs watering again. The baby roots are stressed and are not spreading out through the...

Just be patient, and vigilant, keep an eye out for bugs, moving dots on your leaves. When plants are stressed they can emit an odor that attracts bugs during that phase until they settle down and get on with growing.

The main thing is that they are not dying. Sometimes though in an effort to get grows to look like those photoshopped grows on cannabis mags, you can end up killing your plants trying to 'fix' them when what they need is time to recover.

Another thing to consider is that with the higher pH you might want to drop the EC down as well. The closer to soil that mix is the less you want to crank it like its hydro. Also considering that the plants are under stress from nutrient lockout, they need a bit of a break and time for the roots...