Issue with nutrients or light?

[nathanpunk]

Hey all new to this forum to post but have read plenty. I am using a 1000w MH 4 feet high right now on these autoflowers, in an FAG setup which seems to be working well so far except this beauty who has some blemishes. My second grow but first in my FAG setup. I have my sprayers on a 5min/5min cycle this is her 3rd week to date from seed they all are using advanced nutrients 1ml/L GMB and 1ml/L B-52 along with 1ml/L tarantula, piranha, voodoo juice but I just stopped those last 3 this week water ph to 6.0
Any help is appreciated friends

 

[hotrodharley]

Have you looked under the leaves?

 

[OldMedUser]

Looks like low calcium possibly. Using any calmag?

What exactly is a FAG system? I've done lots of DWC with AN nutes but never used all the other shit. Just Big Bud and Rhino Skin with the base nutes. Any old calmag and some epson salts.

You shouldn't be messing with the pH using pH Perfect nutes. It screws things up when you do. RO water and leave them alone. What's your water like?

They're looking pretty dark green too so those spots could be the onset of toxic salts buildup but it's fairly early in the grow for that to be showing up.

Otherwise it's a good looking plant so it might just be a temporary condition that won't progress so I wouldn't do anything drastic until you know for sure that you need to.

It's also very moist that close to the hydroton so might be a bit of a fungal thing. Maybe remove some bottom leaves to get better airflow around the base. All the air you pump in comes out of the pots very moist and can be trapped at the base.

 

[nathanpunk]

Looks like low calcium possibly. Using any calmag?

What exactly is a FAG system? I've done lots of DWC with AN nutes but never used all the other shit. Just Big Bud and Rhino Skin with the base nutes. Any old calmag and some epson salts.

You shouldn't be messing with the pH using pH Perfect nutes. It screws things up when you do. RO water and leave them alone. What's your water like?

They're looking pretty dark green too so those spots could be the onset of toxic salts buildup but it's fairly early in the grow for that to be showing up.

Otherwise it's a good looking plant so it might just be a temporary condition that won't progress so I wouldn't do anything drastic until you know for sure that you need to.

It's also very moist that close to the hydroton so might be a bit of a fungal thing. Maybe remove some bottom leaves to get better airflow around the base. All the air you pump in comes out of the pots very moist and can be trapped at the base.

FAG is false aeroponics growing, where my reservoir and sprayers are all in one. My waters natural ph is 7.00 I do use calmag but I may have under used this past water change out here is some pics of the other ladies this grow for reference she seemed to be the only one or 12 with issues I just got my ro water stored up to be able to use so maybe some salt buildup from my tap water

 

[OldMedUser]

FAG is false aeroponics growing, where my reservoir and sprayers are all in one. My waters natural ph is 7.00 I do use calmag but I may have under used this past water change out here is some pics of the other ladies this grow for reference she seemed to be the only one or 12 with issues I just got my ro water stored up to be able to use so maybe some salt buildup from my tap water

View attachment 4331889 View attachment 4331890

Looking at the others now I notice they have some decent clearance above the pots compared to the one with issues.

I'm pretty confident it's just a fungal issue so I'd either cut off the damaged portions of affected leaves or better yet just snip them out. The plant will never notice they're gone and later they'll either fall off on their own or you'll cut them off when you trim up the plant for flowering.

Leaving them runs a higher risk of it turning into a real problem like PM which it's possible it already is. I've had it before and as long as the environment doesn't support it's spread it's not a big deal. Taking out those leaves will likely be the cure. There is a micro-climate under those leaves that is probably just right for fungal spores to flourish. If you have some silica supplement 2ml/L should make an effective spray to wipe it out. Potassium silicate is very alkaline and fungus don't like that. Good as a foliar feed to get silica in your plants as well tho I add a bit to my water. I don't like having to spray anything on my plants if I can avoid it tho it's a good way to correct a deficiency quick especially if there are root or pH issues that are preventing some nutrients from being taken up, aka: locked out.