Plant Problem (Nutrient Deficiency ? See Pics please )

Hello , I am having a problem with my plants . New growth looks good , but lower branches having issue . I think it might be nutrient burn , but was wondering if someone could look at my picture and tell me ?

LED's 6 inches from tops
Room is a/c
5 x 5 grow hut (reflective mylar inside)
Lights off temp 70 F and 38 to 45 humidity
Light on temp 78 F and 38 to 45 humidity
4 week veg just started 17 days flowering
House and garden aqua flakes
Ebb and gro 2 gallon buckets
resevior 30 gallon
I use ph pen and also have ph monitor in resevior
ph 5.8 to 5.9
Bottle water (initial ph is 7.0)
ppm on initial water is 10

ppm currently is 1020
ph currently is 5.8

Grow Media (sure to grow inserts)

If I left something of the details out my apologies let me know and I will add the information.

Anyhow , here is the picture of on of the leaves hopefully someone can shed light on if I am right or is it too much N .

Thank you in advance for any help you can!
Noobie Farmer

I forgot to add couple details.
2 air stones in resevior 24 hour a day
1400 gph impeller mixing 24 hours a day
water temp 68 degrees
air circulation 24 hours a day (no co2 injection)
I cut back the water to 2 times per day yesturday (worried about overwatering maybe) was at 4 times per day for 15 min flood

I think that covers it .

Thank you
Noobiefarmer

That looks like damage from a lack of oxygen as everything else seems fine yet you make no mention of how well air is flowing (ditto the water, a failure of either part of the pump system and you'll have problems like this) - check your airstones. Make sure your water is highly saturated with tiny bubbles. Easiest way to check this is to feel your pump, if it's warm, something is likely restricting airflow.

Quote:

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Originally Posted by khyberkitsune

That looks like damage from a lack of oxygen as everything else seems fine yet you make no mention of how well air is flowing (ditto the water, a failure of either part of the pump system and you'll have problems like this) - check your airstones. Make sure your water is highly saturated with tiny bubbles. Easiest way to check this is to feel your pump, if it's warm, something is likely restricting airflow.

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Any suggestions on pump size and type of stones for 30 gallon resevoir . I will pick them up tommorrow .

Thank you
Noobiefarmer

30 gallon? One of those smaller industrial pumps with a 4-way splitter, and four of those large 4-inch round air discs.

I'm helping a friend start up an ebb and gro with sure to grow inserts. Anyway we made a modd to lift the pots an inch and a half to keep water from standing in pots. 2 young ones died so we lowered it back. water level I guess. kind of looks like your leaf when they died.

So all the same except room. His are not growing as fast as we thought so we went to 8 feeds a day and things are looking better the past week. It's very hard to find any info or anyone using STG inserts with an EBB&GRO.

If it doesn't look better soon bump your feeds back up. STG says that since the STG does not wick that growers can up the feed times to bring more nutes to the roots.

Quote:

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Originally Posted by LOC NAR on probation

I'm helping a friend start up an ebb and gro with sure to grow inserts. Anyway we made a modd to lift the pots an inch and a half to keep water from standing in pots. 2 young ones died so we lowered it back. water level I guess. kind of looks like your leaf when they died.

So all the same except room. His are not growing as fast as we thought so we went to 8 feeds a day and things are looking better the past week. It's very hard to find any info or anyone using STG inserts with an EBB&GRO.

If it doesn't look better soon bump your feeds back up. STG says that since the STG does not wick that growers can up the feed times to bring more nutes to the roots.

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Ok , I was worried I might be drowning them , I am at 2 times a day now and still moist from first soaking . I will watch and post what I see .

Thanks
Noobiefarmer

Quote:

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Originally Posted by khyberkitsune

30 gallon? One of those smaller industrial pumps with a 4-way splitter, and four of those large 4-inch round air discs.

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I bought small industrial and one of those big circle loops that state for up to 40 gallons . Now looks like jacuzzi :) . I will let you know how it goes.

Thanks
Noobiefarmer

Quote:

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Originally Posted by noobiefarmer

I bought small industrial and one of those big circle loops that state for up to 40 gallons . Now looks like jacuzzi :) . I will let you know how it goes.

Thanks
Noobiefarmer

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I will wager on the higher oxygen helping. By chance, are your cubes surounded by any plastic? You should remove that to promote aerial root growth.

No plastic , I have mine in the cloner insert , it is round black coller . All the roots below the coller are not restricted. I am waiting to see if the additional a bubbles help . Currently it is producing problem ten fold the amount of buddles then it was. It really does look like a jacuzzi . :)

Thanks
Noobiefarmer