Large Fan Leaves Orange Tips?

[Joint Monster]

Okay this should be an easy one but I can't seem to think of it atm.... phosphorus deficiency?... or nute burn? please tell me on I'm the right trail?
Seems to be orange-rustic spots on the older fan leaves only.

 

[JungleTime]

rustic spots usually means lack of calcium

 

[Joint Monster]

That was going to be my third guess, however I am already adding approx. 5ml/g of cal-mag every watering.

 

[Resinhound]

Lockout,probably have salt build up in your medium or you have excess macros locking out other nutrients.What medium?what nutrients you feeding.What kind of ppm?whats your runoff ppm comparative to your feed ppm or are you in hydro?

 

[noppynoppy]

As for me it looks like cal-mag def.

 

[Resinhound]

As for me it looks like cal-mag def.

5ml/g of cal-mag every watering.

 

[slyone]

What Resinhound said.....Nutrient burn it looks like to me, back off some and see if she recovers, mine were the same, as soon as I backed off the notes they started to look better, along with salt build up I would give them a flush then resume with lower nutes.....

 

[Joint Monster]

Yeah i usually do a quick flush before transitioning, but i still have two nutrient watering left in my res. So I will do a flush and maybe ease up on the nutes a little. I was thinking most likely nute burn.
It's soil by the way. Pro Mix. GH full line pretty much. 6.7ph. No ppm meter atm. I do not water to run off.
To me, it seems as though they get slightly worse after watering so I think it might be safe to say over nutes, just slightly over..
I know the hps bulb doesn't help the diagnosis either lol... I'll try to get lights off pic just before or after they go out.

 

[KryptoBud]

Yeah i usually do a quick flush before transitioning, but i still have two nutrient watering left in my res. So I will do a flush and maybe ease up on the nutes a little. I was thinking most likely nute burn.
It's soil by the way. Pro Mix. GH full line pretty much. 6.7ph. No ppm meter atm. I do not water to run off.
To me, it seems as though they get slightly worse after watering so I think it might be safe to say over nutes, just slightly over..
I know the hps bulb doesn't help the diagnosis either lol... I'll try to get lights off pic just before or after they go out.

I think you're PHing your water/feed a bit high. 5.8-6.2 is ideal for pro mix.

 

[Joint Monster]

I think you're PHing your water/feed a bit high. 5.8-6.2 is ideal for pro mix.

hmmm interesting! I usually start at 6.3-6.5 in veg. and then 6.5-6.8 in flower. Would you guys say it is better to just stick to 6.5 throughout? Its just, on the slightly higher range ph, they get macro/micro nutrients and are more beneficial to flowering no and on slightly lower more veg nutes?