Help!yellow leaves cant solve the problem

Hi guys im havin problems with my plants i have 3 plants in a nft system in a room of about 5 foot by 6 and about 9 high i have a fan for cold air an extractor fan and im growing under a 250 watt light i have growed my last crop perfect no problems but this 1 has gone bad same cuttings aswell my ph is 6.2 im growing with vitalink hydro part a and b 2ml litre of water because they are young they have been like this for 5 days i have tryed ryzotonic its a sea weed extract to help them but its not done any gud i have tryed epsom salts it dont seem to be getting worse but its not any better ive just brought some superthrive to see if that helps any ideas they have rooted through the rockwool seem okany help would be appreciated thanx.

boy thats a tough one. looks like salt damage, or PH, which can fluctuate while adding nuts or not...then watering. But I am actually having the same problem...looks identical to what im dealing with right now..thats why i signed on today. so il watch this link dude sorry homes

Looks like nute burn.

What are the temps in there? How often do you check ph?

What happened to that one leaf... in the first pic (333) the bottom most right leaf looks like it is missing pieces??

Rudy Rudiger said:

Looks like nute burn.

What are the temps in there? How often do you check ph?

What happened to that one leaf... in the first pic (333) the bottom most right leaf looks like it is missing pieces??

Click to expand...

i check ph every day i dont have a temperature gauge but will get 1 tomorow but its not hot in there i have turned the 250watt off and put a normal light in dont want to do any more damage till i no wats up i have asked growers in my area they dont no the problem and sum o fthe leaves were cut down when i got the cuttings

i havent changed anythin from when i finished my first grow only used the same food i have kept my nutes bottles in the room could that be the problem so i brought some more today im only using 2ml of nutes per litre so can that burn them

can any1 help me

Flush them and no nutes for a week.

Your setting yourself up for disaster here my man.

When you have problems like this, take it one step at a time. It will make your life and grows much easier. By one step at a time, I mean that its important to keep everything the same until you pinpoint what the issue is. For instance, its looks to me like you have either nute burn or heat stress. In a matter of three days you have switched nutes up and changed your lighting. Those are two very important variables that you tweaked which makes things much harder to diagnose.

Can you post some pics of the whole cab.

What are your ppm measurements? In your res and when you water? How often you changing the res?

Also, what does that temp gauge read?

Why did you shut off the 250W? What exactly is a normal light?

thankyou for your comments i have changed the light to a spot because if it was heat stress i didnt want to hurt them anymore because it spreads fast ive lost 2 now i only have 1 left. i havent changed the nutes ive kept them he same at 2ml i brought the other stuff because ive read so much on ea that it gets confusing as to wat the problem is i change the res every 3 days and i do a ph wen the nutes are in the water and the pump constantly pumps the water around the res.my 250w light is about 1 1/2 feet off the plants and its not hot above the plants i have a fan blowing on the plants aswell i will post more pics tomorow of the room and the temp.thanx

sorry spot meaning spotlight

the room temp is 75 humidity is 40 just to let u no i lost all the plants i did wat u said a flushed with just water they were ok for 2 days then they started turning yellow again and dying ive put some pics up of the room i am going to try again with some new plants ive put some more pics up of the plants as they were looking better if any knows what the problem is it would be much appreciated.thanx