AN INTERESTING PPM PROBLEM, 1800 in VEG and Climbing!

Rusty Shakelford

Well-Known Member
Hey Everyone,, I have an Interesting issue that I wanted to run by you.

I recently moved our mothers into a Semi Sealed room cause we are expanding. I say Semi Sealed cause there are Cracks, Electrical Outlets, etc that keep it from Being TOTALLY Sealed, but its fairly tight for all intent and purposes.

With this I added a CO2 Burner, just to make sure they dont suffocate,, and set it to the lowest setting of 350 ppm with a Deadband of only 25, so when it kicks off, the PPMs tend to drift up to 450-500 and over the next 3 hours will come back down to 350.

I have the Girls under 400 watt MH lamps
Temps hang from 78-82 during the day.
Humidity is 58-65 and up to 70 during lights out.

I have multiple Oscillating fans moving air and plants around at all times.

NOW, here is my issue,, When I first moved the mothers in the room from my old Vented room I was feeding them 800ppm's (.5) Which is where they pretty much topped out in the vented room, but then I started seeing what looked to be a Magnesium Deficiency starting on the Large Lower Leaves,,, So I went ahead and added CalMag to my mix (I use Coco and have been fortunate enough not to ever need calmag previously). Unfortunately the Deficiency continued, so I began raising the Nutrient PPM's slowly as to not Burn the Ladies,,, but the Issue persisted although no Nutrient Burning was apparent, so I continued to raise the PPM's. This seemed to be working (somewhat), so I continued to Raise the PPM's.

Well now I am at 1800 PPM's and they are looking better (to a degree) but it looks like I might have to continue Raising those PPM's. 1800 PPM's!! This is UNHEARD OF for me at least!!

NOW, before we go too much farther, let me throw in another Left Turn - I actually set up 2 Semi Sealed rooms. One is for the mothers, and one is for clones and Young up-and-coming mothers, pre-teens, etc. This clone room is lit by fluorescent lights only and the CO2 never gets down below 450 PPMs,, I dont think the burner has ever turned on in this room. YET, the same issue exists,, I have to scave off deficiencies by throwing PPM's at the girls, and my meter tops out at 2000.

So lets go ahead and break down the rooms so we can all see what we are talking about without having to filter through the above Text:

MOTHER ROOM:
(6) 400 watt HPS Cool Tubes vented from the outside, to the outside.
(1) CO2 Burner hooked to Propane Tank and Titan Controller
(1) Mini-Split AC/Heater 12000 BTU
(1) Dehumidifier
Oscillating Fans
CURRENT TEMP = 78
CURRENT HUMIDITY = 64%
CURRENT CO2 = 373ppm

CLONE ROOM:
(1) 450 watt 4' (8 Lamp Florescent Light Fixture over a flood tray for Cups, Pre-Teens, Future Moms
(9) 64 watt 4' (2) Lamp Florescent Fixtures over Domes and Clone Trays
(1) CO2 Burner hooked to Propane Tank and Titan Controller
(1) Mini-Split AC/Heater 9000 BTU
Oscillating Fans
CURRENT TEMP = 79
CURRENT HUMIDITY = 68%
CURRENT CO2 = 575ppm
I will say that the new rooted clones look GREAT!

WATER IS RO and I PH my mix to 5.8-6.0 Consistently


This is a Pic of the Deficiency Specified above in the Mother Room:
20140802_070809.jpg
Here is the same plant above at a Higher Angle - Getting 1800 PPM's (.5) and looks like I may need to continue to raise it. She is AK47 and that is OG Kush on the left.20140802_094615.jpg

These are Pics of the same issue in the CLONE ROOM:
20140802_070644.jpg

Throwing PPM's at them seem to slow down the issue, but Its just never ending!! Those lower leaves just keep deteriorating slowly. OH AND NOT ONE SIGN OF NUTRIENT BURNING.. The Tops are all quite nice looking, including the Mothers.. They all look GREAT, until you look down.
20140802_070653.jpg
20140802_070742.jpg


Here is a New Seedling that I popped just over almost 2 weeks ago. As long as I throw HIGH PPM's at her, she is looking GORGEOUS! She is already getting 800 PPM's on a .5 Scale. Could you imagine if my meter was set to .7 ??? And where is it gonna Stop considering this is only the beginning of her life ???20140802_070727.jpg

So I guess my question is,,, Has anyone ever experienced this type of Nutrient Requirement from plants in VEG when all of my environmental factors seem to be tight,, with the exception of the SLIGHTLY inflated CO2 Levels ?? None of this has stopped them growing just fine,, they continue to grow into the lights and I am continually raising them.

Let me know your thoughts on this one,, Cause I am STUMPED!!

Oh and one other thing,, I started playing around with Maxi Bloom for a few of the girls cause its a Powder and I am looking to save a few bucks and possibly switch over from the CNS17 currently being used,, But at such high PPM levels, the Maxi is TANKING my PH,, and requires MEGA PH UP and PRO-TEKT SILICON in order to get it back up to the 5.8 - 6.0 range. This cant be good for the Mix ??? ANY SUGGESTIONS ??

Thank You in advance for taking a look and responding with Useful suggestions !!

Here is a Shot of the Larger Moms in the MOTHER ROOM: Various Strains from Pineapple Express to Girl Scout Cookie to Blue Dream, OG Kush, Sour Diesel, NLxBB, WWxBB.20140802_094719.jpg
 

jondamon

Well-Known Member
Look into the 1:1.5 extraction test for testing your coco in the pots having issues.

The trouble with coco is that over time it has a tendency to produce K and hold into Mg.

When K gets too high it becomes toxic which can In turn lead to uptake issues with N, Mg, Ca and P.


Start by testing your rootzone using the 1:1.5 method.

Once you've tested come back with the results and we'll work it from there.



J
 

Rusty Shakelford

Well-Known Member
Look into the 1:1.5 extraction test for testing your coco in the pots having issues.

The trouble with coco is that over time it has a tendency to produce K and hold into Mg.

When K gets too high it becomes toxic which can In turn lead to uptake issues with N, Mg, Ca and P.


Start by testing your rootzone using the 1:1.5 method.

Once you've tested come back with the results and we'll work it from there.



J
This would not apply cause the same issue is happening with the girls in the Clone room, and as you can see by their size, they have not been in the Coco long enough to start having the problem you mentioned.

Also, I have been using the same brand of Coco for years without this issue ever.
 

Rusty Shakelford

Well-Known Member
Anything above 1500 PPM isn't beneficial. More is not always better.
Thanks, unfortunately not much help dialing in on why this is happening,, and YET, so far the higher PPMs are keeping them alive and thriving, and continuing to ask for more. I am using two completely different nutrients on individual plants,, and getting the same results.
 
Top