You got the best equipment temp humidity air flow just right, PH water temp on the money, most expensive lights you can get. You might've tried RO water. But as soon as you push the ppm pass 400+ this happens
Its not your fault its the well water.
My system RDWC
Chiller
Combo leds and mh/hps
Room temp 75-78 day 68-70 night
Humidity depends on what stage of growth your in seedlings 70 two weeks 65 flowering 60 last week 45
Water PH in res 5.8-6.0
Well water 143 ppm - PH 7.8. That's not bad right. Well water can have a bunch of stuff in it some good some bad.
The bad calcium carbonate it bounds to phosphorus and makes calcium phosphate. Lockout of these nutes will lockout iron magnesium and so on.
Now I use my pond water
122 ppm - PH 7.4
Fish ducks frogs small water bugs plant life all around.
I run the water through a .5 carbon filter just to clean it up. PPM 92 - PH 7.1
Now the nutes are up to ppm 720 and they can go higher.
If I run that high with the old well water the plants would be dead in two or three days.
Here's day two at 720 ppm.
These two weeks in flower.
I'll post more later.
Its not your fault its the well water.
My system RDWC
Chiller
Combo leds and mh/hps
Room temp 75-78 day 68-70 night
Humidity depends on what stage of growth your in seedlings 70 two weeks 65 flowering 60 last week 45
Water PH in res 5.8-6.0
Well water 143 ppm - PH 7.8. That's not bad right. Well water can have a bunch of stuff in it some good some bad.
The bad calcium carbonate it bounds to phosphorus and makes calcium phosphate. Lockout of these nutes will lockout iron magnesium and so on.
Now I use my pond water
122 ppm - PH 7.4
Fish ducks frogs small water bugs plant life all around.
I run the water through a .5 carbon filter just to clean it up. PPM 92 - PH 7.1
Now the nutes are up to ppm 720 and they can go higher.
If I run that high with the old well water the plants would be dead in two or three days.
Here's day two at 720 ppm.
These two weeks in flower.
I'll post more later.