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Old 11-26-2020, 12:12 PM #11
f-e
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Major signs of Mg imo. Spray just one. You can do the rest later if it works. I wouldn't get carried away with any additional feed with the leaves curling under like that. Doesn't that indicate toxicity?
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Old 11-27-2020, 12:06 AM #12
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salt damage

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Originally Posted by Dr.FillDaBlunt View Post
Hey everyone. I have been dealing with some plant issues recently and I just can't seem to figure out what's going on. The most recent SAP analysis showed I was low in Fe, Mn, Zn.

My vegetative room has (50) Jungle T5 48" lights.

I use organic living soil with a coco base.

CO2- 600ppm

400-500 PAR

Water Temp - 68*

Plant Temp - 79*-82*

Ambient Temp - 80*-82*



At first, I thought there was something wrong with my water. I had my water tested and sure enough, it had some bacteria colonizing in it. However, the testing facility was not able to tell me what specific bacteria it was. I cleaned all my res' and irrigation lines. Waited 1 week and tested the water again and came back clean. So I'm thinking I can start to rule out the water issue, but something in my gut says it can still be something in the water. I do have another water test submitted just to check once again.



I use CaMg every water

Current pH: 6.5 (sometimes it creeps higher to 6.8-6.9 halfway through watering and I have to readjust it.)

After about 4 weeks the plants start to exhibit signs of deficiency/stress. (shown in pics)

I amend my raised beds with BioLive.

I have grown all these strains for YEARS without any issues.



ISSUES:

-The new leaves start to get small

-Yellow/pale

-Eventual purpling

-Blistered look. (The margins in between the veins of the leaves start to literally look like they push out like a blister.)



The odd thing is once I transfer plants to my Bloom room they seem to heal and get better. In my head, they start to recover because they have an abundance of food and can start to eat.



My Bloom room has 90 DE Phantom lights. Grown in 60 gallon No-till Raised Beds.

CO2 - 900 PPM

750-900 PAR

Water Temp - 68*

Plant Temp - 79*-82*

Ambient Temp - 80*-82*



I haven't been feeding the plants anything extra besides what's in the soil. Could the plants be eating so much food it's draining my soil of nutrients within 4 weeks and I need to feed? Do I need to do anything "special" with my fertilizer program and/or pH when using LED's?



PICTURES: The plants in pots are in VEG and the plants in the beds are in BLOOM.



Upon request, I can give any additional info/pics.

Any input would be greatly appreciated.
that is DEFICIENCIES because of salt buildup in the medium. no question .
the only solution is to make up a complete 12 mineral solution a d flush out old unbalanced solution with fresh balanced solution. do a runoff test to see EC of water coming out
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Old 11-27-2020, 01:51 AM #13
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Quote:
Originally Posted by nohnsmith1010 View Post
that is DEFICIENCIES because of salt buildup in the medium. no question .
the only solution is to make up a complete 12 mineral solution a d flush out old unbalanced solution with fresh balanced solution. do a runoff test to see EC of water coming out
Explain where the salt buildup comes from when he's in organic soul and plain water with no nutrients?
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Old 11-27-2020, 02:22 AM #14
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ph rarely an issue in the range of 5 to 7 . it is very little difference in absorption. ph influences nutrient uptake but only by +/- 1 to 15 % . it does not stop uptake and favours some as it changes. ph is the last thing especially in carbon based soiless
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Old 11-27-2020, 02:48 AM #15
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ph

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Originally Posted by nohnsmith1010 View Post
ph rarely an issue in the range of 5 to 7 . it is very little difference in absorption. ph influences nutrient uptake but only by +/- 1 to 15 % . it does not stop uptake and favours some as it changes. ph is the last thing especially in carbon based soiless
those graphs are not accurate. I was looking for a numbered chart . I personally never check when using pro mix or any spagnum based . in rockwool it was an issue but not acidity, alkalinity and only because of chelates in my feed . chelated minerals are much more absorbable than mineral ion but they drop out above 7.5 and dont come back. mineral ions less absorbable but dont drop out
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Old 11-27-2020, 02:53 AM #16
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LOL, That looks just like a ph issue IMO. Looks like your in coco?. That's requires a lower PH of 5.8-6.0.. Also your PH should not be changing that fast. I use a ph of 6.5 it will stay that way for about 4 hrs before it starts to drop again. If you using air to mix that also makes the PH change faster. I use a bubbler in my veg drum, In 24 hrs the PH drops to 4.8.


I use in veg

HP PRO MIX

PBP GROW Nutrients

450PPM

PH 6.5
I don't water until the pots are dry. It cant take 2-3 days



Flower

Hydroponic research Dirty Nutrient
1.2ec

ph 6.5
Same feeding routine. If the pots are wet don't feed. After about 2 weeks they start drinking everyday.
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Old 11-27-2020, 03:15 AM #17
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should be fed daily

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Originally Posted by Hammerhead View Post
LOL, That looks just like a ph issue IMO. Looks like your in coco?. That's requires a lower PH of 5.8-6.0.. Also your PH should not be changing that fast. I use a ph of 6.5 it will stay that way for about 4 hrs before it starts to drop again. If you using air to mix that also makes the PH change faster. I use a bubbler in my veg drum, In 24 hrs the PH drops to 4.8.


I use in veg

HP PRO MIX

PBP GROW Nutrients

450PPM

PH 6.5
I don't water until the pots are dry. It cant take 2-3 days



Flower

Hydroponic research Dirty Nutrient
1.2ec

ph 6.5
Same feeding routine. If the pots are wet don't feed. After about 2 weeks they start drinking everyday.
what is run off ec? I run promix jp as a hydroponic medium drip fed daily. your EC.is 1.2 .. water until run off and check. my opinion is it will be 2400 or higher
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Old 11-27-2020, 05:47 PM #18
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Quote:
Originally Posted by nohnsmith1010 View Post
what is run off ec? I run promix jp as a hydroponic medium drip fed daily. your EC.is 1.2 .. water until run off and check. my opinion is it will be 2400 or higher

I do not check runoff. There is no need to do that. Only time that's helpful is if your having issues that you do not know how to fix. HP promix has no pre charge of Nutrients. Its similar to hydroponic medium but you grow in it like its soil. Ive been using it for 6 years now. The only time I see issues is when my PH probes fail.
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Old 11-28-2020, 01:14 PM #19
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salts

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Originally Posted by RockinRobot View Post
Explain where the salt buildup comes from when he's in organic soul and plain water with no nutrients?
minerals in a chem form such as calcium nitrate Ca(NO3)2 are the SAME nitrate as in blood meal compost or worm coatings. it's a nitrate NO3 or ammonium nitrate NH4 such as in ammonium nitrate. the only difference is his they are bonded in the carbon the carbon is just a delivery system. a carrier mechaimsn . the mineral salts are not different. . REGARDLESS of source for the roots to absorb eg itrogen . the nitrogen MUST dissolve into the solution . whether is is calcium nitrate or blood meal the nitrate must be water soluble.
if a medium had too much water soluble nutrient ( any of them) they will burn or lock up other Minerals. the CEC IR CATION EXCHANGE CAPACITY of carbon ( 5he vanderwall forces just line carbon filters) will hold a reasonable amount of excess minerals acting as a buffer but only so much . this will do it whether the feed is a refined chemical or a organic source.
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Old 11-28-2020, 01:20 PM #20
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always check

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Originally Posted by Hammerhead View Post
I do not check runoff. There is no need to do that. Only time that's helpful is if your having issues that you do not know how to fix. HP promix has no pre charge of Nutrients. Its similar to hydroponic medium but you grow in it like its soil. Ive been using it for 6 years now. The only time I see issues is when my PH probes fail.
cheoking runoff is standard procedure for any system.
plants do not use minerals evenly. not overwatering means every mineral not used is buying up interfering with proper uptake of the rest.
runoff is 5p easy not 4o check. it takes no effort and allows 5ou to notice issues before you see it In the leaf. once you see s leaf issue it is already to late . now you are just putting on bandaid. it better to avoid issues with proper maintenance.
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