Light burn, or more?

[Grit99]

Rdwc system clones transplanted 8/13
Temp: 80-83
Humidity: 40-60
Res temp: 67-68
General hydro nutes with Lucas formula 580ppm last check
Ph-5.8-6

Is this light burn or do I have more going on? Please let me know if I need to supply more Information. Two diff plants in photos

Thanks everybody for helping!

 

[Billy the Mountain]

It's certainly not light burn

Looks severely malnourished, particularly Potassium

Raise your EC

 

[Grit99]

It's certainly not light burn

Looks severely malnourished, particularly Potassium

Raise your EC

Billy, thanks for the reply! Being I’m at 580 now, should I try say 650 and see how they clear up up or go higher?

thanks again for the help!

 

[keep it real.]

Looks like a root problem to me, but iv never done DWC. Someone else might have more info. Any possibility you are mixing nutrient solutions in the wrong order?

 

[Billy the Mountain]

Billy, thanks for the reply! Being I’m at 580 now, should I try say 650 and see how they clear up up or go higher?

thanks again for the help!

I concur with @keep it real.
Do you have a pic of the roots? With the pH, temps, and EC numbers you gave, I would expect the plants to look much healthier.

 

[Grit99]

I

I concur with @keep it real.
Do you have a pic of the roots? With the pH, temps, and EC numbers you gave, I would expect the plants to look much healthier.

I’ll take some root photos when lights come on in 3 hours and update the post.

 

[Grit99]

Root photos per request. ( more than 1 plants worth of photos for roots, all share same res)

 

[Billy the Mountain]

Root photos per request. ( more than 1 plants worth of photos for roots, all share same res)

Roots are nice and white but pretty sparse. It's been a bit since I've done dwc but the roots should look
a lot more dense.

Happy DWC roots:

 

[sunasun]

It's certainly light burn

Looks severely malnourished, particularly Potassium

Raise your EC

Fixed that for you. It is light stress, for quite some time too.
Op either raise your light height or lower your intensity. You're giving her more than she can handle at her size.

 

[OldMedUser]

That is not light stress.

Bring your ppm up 25% but use all your 3-part nutes at a 1-1-1 ratio to do it. Lucas Formula is fine for after the stretch but during veg they need a balanced diet. There's a lot of the Mg in the Grow portion along with the N and with Lucas using half the Micro as Bloom your N is low as are other things a needy plant like pot needs to thrive.

If you're planning a nute cahnge then reload with 1-1-1 and add a dash of Epsom Salts too. Tsp/gal is lots unless treating a deficiency and I think you're a little deficient in a lot of stuff tho a good feed with all the nutes should fix that.

I've done about 50 DWC grows since '01 and have tried all sorts of nutes and combinations. I use AN 3-part but it's the same kind of things in each bottle as GH. I only ever used RO or distilled water as stuff in tap water can screw things up too. When pH Perfect came out it cut my workload in half not that DWC is much work at all compared to doing this organs stuff. I think I'm going back to DWC pretty soon just to get a break and a lot more pot!

 

[hotrodharley]

@Billy the Mountain already said early - raise your EC.

 

[Billy the Mountain]

Fixed that for you. It is light stress, for quite some time too.
Op either raise your light height or lower your intensity. You're giving her more than she can handle at her size.

You "fixed" nothing and simply added more noise to the signal to noise ratio in this forum.

 

[Grit99]

Raised ppms with a res change and lowered my light output about 10%. The girls are looking very happy, I’ll take some pictures when home from work today. Definitely appreciate the support from everybody!

 

[BenGman]

Good stuff, cos they were starving for food.. bulk em up.

 

[sunasun]

Any updates

 

[danzibar1]

Rdwc system clones transplanted 8/13
Temp: 80-83
Humidity: 40-60
Res temp: 67-68
General hydro nutes with Lucas formula 580ppm last check
Ph-5.8-6

Is this light burn or do I have more going on? Please let me know if I need to supply more Information. Two diff plants in photos

Thanks everybody for helping!

obviously take everything into account environment etc etc before making any decisions about feed etc

this list can come in handy

 

[OldMedUser]

This chart here has a lot more detail and if you follow the clues you can usually figure out what's going on.