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H3ad goes Coco

J23

Member
Thank you guys for all the input.
My tap is 190-200ppm. I mix it with distilled and after adding nutes I lower the ph with PH DOWN to 5.7 - 6. When I noticed burn I decided to increase the amount of distilled water.
Now I noticed a few new leafs. I'll watch them for burn signs. For the last few days I have been using fert at 616ppm before feed with 810pp runoff. Maybe that info will help...
Again - thanx much for help and enjoy holidays!
 

blank85

Member
Thank you guys for all the input.
My tap is 190-200ppm. I mix it with distilled and after adding nutes I lower the ph with PH DOWN to 5.7 - 6. When I noticed burn I decided to increase the amount of distilled water.
Now I noticed a few new leafs. I'll watch them for burn signs. For the last few days I have been using fert at 616ppm before feed with 810pp runoff. Maybe that info will help...
Again - thanx much for help and enjoy holidays!

What coco do you use? Has it been buffered?
 

Slimm

Member
Looks like a bad case of mag deficiency; could be some Ca issues as well. Can't really tell from the photo. Supplement with CaMag or Epsom salts.

Once this happens in coco, the medium will act like Cal mag sponge so keep giving a moderate dose of CalMag throughout the grow.
 

ambertrich

Active member
Veteran
Looks like a Mg deficiency to me as well. My Sour Bubble's looked almost the same this grow, forgot they are Mg hogs and then some. Have a Northern Lights cross that needed a Mg boost as well, but not sure if that is a trait of NL or not (being a Mg hog that is). Hit em with some Ca/Mg and epsom salts as Slimm suggested, with every watering.

Be sure to precharge your coco with half strenth nutes and full dose Ca/Mg. I use this in place of water to rehydrate coco bricks and it makes all the difference.

Also, get some Drip Clean by H&G, and you will have no need to flush each week. It will prevent salt buildup.

Good luck with your plants, hope they finish up nice for ya.
 

J23

Member
To answer your questions - it's a Nirvana's NL (fem). Coco Tek brick by GH. Not sure if it's buffered. I only flushed it. Will try epsom and Cal/Mag as suggested. What is recommended dosage?
:tiphat:

EDIT:

just checked the local store - they carry Cal-Mag Plus. Should I get it?
 

Slimm

Member
That will work - follow the recommendation on the bottle. After a couple waterings you may need to drop down to a weaker dose.
 

blank85

Member
To answer your questions - it's a Nirvana's NL (fem). Coco Tek brick by GH. Not sure if it's buffered. I only flushed it. Will try epsom and Cal/Mag as suggested. What is recommended dosage?
:tiphat:

EDIT:

just checked the local store - they carry Cal-Mag Plus. Should I get it?

I had similar problems to you before i started properly preparing my coco.

Here is some info ive been given:

ROOTZ said:
"I always pretreat my coco with a 1500ppm (3.0 EC) buffer solution of calcium nitrate, magnesium nitrate, magnesium sulfate & iron sulfate (I make my own).

This effectively rearranges the base saturation in favor of more ca/mg.

Before pretreat:
Potassium and sodium occupy 96% of the base saturation, while calcium, magnesium and iron occupy ONLY 4%

After pretreat:
Potassium and sodium NOW occupy 71% of the base saturation & Ca/Mg/Fe NOW occupy 29%.

So in essence, by readjusting the base saturation in favor of more calcium and magnesium I don't have to supplement with any cal/mag products, which over time slowly creates deficiency and/or toxicity problems. When the cation balance is established between the plant and substrate, my nutes only act to replenish the coco. "

Here's what I do to pre-treat my coco:

Mix up a concentrated mix of 290g calcium nitrate, 280g magnesium nitrate, 10g magnesium sulfate (epsom salt) & 2g iron sulfate. I usually keep my concentrate in one of those liter sports bottles from Target.

So once you've hydrated and flushed your coir, prepare a buffering solution of 1500ppm (3.0 EC) using the same source water you plan on using to mix up your nutes. I use my regular tap, as it will only add to the Ca and Mg already in your buffer solution. Dump it in your coco and let it sit for 24hrs. Also, lock in the ph you want for your coir because this solution WILL change the ph.

The Botanicare blocks I use come out to about 6.3-6.5 ph after I hydrate and flush all the leach-able salt. My buffer/pretreat solution is ph'd to about 5.3-5.5 and it'll pull the coir down to 5.7-5.8. I verified this by blending 5:1 water/coco in a blender and testing and using an EC meter.

Hope this helps ya out
smile.gif

I havnt started this yet as i have to acquire the ingredients. What ive been doing up to now is i put about a tablespoon of dolomite lime per gallon (3.78l) of coco. It raises the ph of the coco by about 0.2 but it prevents the nasty cal and mg defs.

Hope this helps.
 

J23

Member
Hello everyone,
So, I got General Organics CaMg (5%Ca + 1%Mg) . As suggested on a label - I added 6ml per gallon which is a light feeding. My nute solution is now +/- 850 ppm. Is it OK or should I lower ppm by adding more distilled water or lowering nutes ratio? I might be paranoid but this time I'd rather asked before I screw something up...

:tiphat:
THNX
 

Slimm

Member
850 does not seem high - I'd run with that. Note that you need the distiilled to bring down your tds / total alkalinity. But distilled has no ca or mg so you end up supplementing. If you water it down with more distilled you will have more mg probs.
 

smokefx

Active member
hey guys, i was wondering when i drop micro at the end of strech ive been giving about 20ml/gal of bloom w/ some pk booster, is that too high? because i see h3ad says 10ml, but my ppms are extremely low after i cut micro and just give it 10ml/gal can anyone fill me in on this?
 

40AmpstoFreedom

Well-known member
ICMag Donor
Veteran
hey guys, i was wondering when i drop micro at the end of strech ive been giving about 20ml/gal of bloom w/ some pk booster, is that too high? because i see h3ad says 10ml, but my ppms are extremely low after i cut micro and just give it 10ml/gal can anyone fill me in on this?

Just got done reading the thread twice:

• I only flush for about 2 weeks, maybe a day or three longer depending...
I don't do a weekly schedule thingy, though... I generally watch my plants, since some go 9 weeks and some go 11... I feed like veg until the plant completely stops stretching and begins bud formation in earnest, then depending on the plant I will bump up the bloom for a week or two before cutting out the micro just about the time the calyx production begins to slow and budswell begins... I feed 0/9 up until 12-16 days before harvest and then go to water for the rest... If a plant does not look done yet when the day count is right I'll let if go a couple more...

• Also, for extremely long flowering strains, leave the micro in a bit longer...
In a 9 week flowerer feed micro up until week 5
In a 12 week flowerer might go 7 weeks or 8...
It does have to vary a bit depending on strain. SSH Flowers for 13 weeks or so, but still cut out the micro after 6 weeks...
 
Z

Ziggaro

Hey guys! Been using coco for the last 2 cycles and really like it. Personally none of my plants can take full strength 6/9 but the ratio is great. Actually the most ive used is 5/7.5 for my 5 foot tall prophets under 600 watts. Hope this helps anyone having problems... I grow in cocotek no flush no pre chtaparge btw using tap water temps around 80.
 

Pirate

Give Me Liberty or Give Me Death !!
Veteran
Great thread H3ad!!

Been reading for a while now and decided to make a switch over from Aeroponics. I don't have the time Aeroponics takes to maintain right now so I figured Coco would be a good method to try but I am already (within a week) running into issues. GRRRRRR Hoping somone here can offer some suggestions.

I am trying to run a flood and drain table with a 50 gallon rez feeding a 3 x 6 tray with 48 plants in a SOG. My problem is with PH. In aero i can set it and it stays the same for days Maybe it will rise very slowly over time. In coco I am having to adjust daily and the plants are suffering for it.

I set my PH to 5.5 / 5.8 and within 24 hours it is up to 6.5. Killin me here.

Anyway, Am I suppose to treat the coco like you would treat rockwool? Should I soak my coco in PH adjusted solution PRIOR to use in order to stabilize it?

50 gallon rez (recirculating flood and drain)
H3ads 6/9 mix / NO additives.
3 x 6 table
48 plants IN VEG (wont flip till I get this squared away)
air temps at 78 / 80
ventilated hoods

Thanks in advance for any help

Pirate
.
 

cocohead

New member
hey pirate

im a new user here, but let me put in my 2 cents.

I was using recirculating hydro systems for a while and then switched to coco.
I found coco not so good to work with recirculating systems since
1) i always had the same problem that you have. ph going up to 6,5
2) maintainance during the grow due to washed out coco coir in the drippersystem (the one i use is pretty fine)

I would guess that if you wash/soak the coco properly, and correct the ph you will propably have no problems at first, but imho when youre a while in the grow you will propably have the same uneven ph in the runoff due to remaining nutes in the substrate that get flushed out later in the grow.

I opted for drain to waste, you can still use your setup etc. just get rid of the runoff.

Its not that maintainance friendly of course like a recirculating system, but the best way for coco in my opinion.

@all
thanks for the great threads&info in here, learned a lot the last 10 years.


greets
coco
 

J23

Member
burned leaves...

burned leaves...

Hi guys. First things first - HAPPY HOLIDAYS!
Now, some of you might remember my last post here. About a month ago my plant's leaves started showing serious burn marks. With your help we establish probable cause - Mg deficiency. Following an advice I started dosing Cal/Mag. Well, plant survived but since almost 90% of leaves got burned - plant is not showing any growth for a month now. I decided to terminate the growth. Considering the fact that I switched to flowering March 20 I think that that is right thing to do. Any thoughts?
On the other hand, since this is my first grow I am happy to learn a few things. About three weeks ago I have started another seed. Its growing nicely but this time I'm controling the number of new grow. Previously I thought that more is better. As a result, I had about 17 colas growing at a snails pace. I'm guessing there was to much growth comparing the root mass and that sloooowed the growth. This time I'm aiming at 5-7 colas. I even tried lollipop to even out the growth. As a result, next node's leaves got that crippled look. Did I cut too low/ too high? Or should I just train the plant instead of lollipop?

Thanks for sharing your thoughts.
:tiphat:
 

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