Problems with my DIY COB's

John LOQUE · Feb 14, 2019

Hello everybody !

i'm back to HPS because i screw up my grows with the LED's i think.
I've prepared 2 batches, one under 300 w of CREE led's and one under 400w HPS. The first got droopy leaves during the day, recovering at night but strange.
The second is fine.
So i put HPS on the first, 600W ( i don't have anything else) just to see, and they don't recover they have droopy leaves even after a night, i can say it's worse, and i don't understand. PH, EC, temp are fine.
I'm out of ideas !
I thought it was because of low temps in winter, but now it's OK, there are not cold.

AgentPothead · Feb 14, 2019

Droopy could be a few things, can we see the plants? A picture is worth a thousand words.

John LOQUE · Feb 14, 2019

this one is showing signs of droopy leaves, even under HPS straight from fluoros without passing by the LED's stage. This one is nice, compared to others.
I put other pics tomorrow. Now it's night and it's very droopy.

Lost in a SOG · Feb 14, 2019

Well maybe they are hitting their maximum DLI and cant take any more light..

Ive done this with LEDs a lot just assuming since the wattage was so much lower or the tech inferior or something.. turned out in my case the LEDs were so much better than HPS you can light burn them without heat burn because they are putting out the right spectrums so efficiently.

LEDs hands down beat HPS but you cant just replace a HPS in your system with LEDs and expect all the other climatic and growth factors to stay the same with such a big change imo..

AgentPothead · Feb 14, 2019

John LOQUE said:
this one is showing signs of droopy leaves, even under HPS straight from fluoros without passing by the LED's stage. This one is nice, compared to others.
I put other pics tomorrow. Now it's night and it's very droopy.

Okay so, to me, those look a little dark green, but otherwise healthy, besides that droop. They don't look like the claws caused by nitrogen toxicity, but I would keep that in mind, just cause how dark green they are. Those plants look young enough it could just be a "hotter" soil than they require. How close are your lamps? It might be like Lost in SOG says with too much light. Hopefully somebody knows that look, cause I'm pretty much at a loss. Good luck bro. Oh yeah, if you post in the infirmary you might get more eyes on it as well. https://www.icmag.com/ic/forumdisplay.php?f=83

Lost in a SOG · Feb 15, 2019

^^ Yeah that plant does look a bit N toxic and cabbage like in that strobey pic tbh.. ive notived when over fed early on they cant hold their pretty huge chunky broad leaves up.. but holding them down is different.

Later in life they taco to avoid light but ive never seen ganja in veg do that..

But too much light being the cause should only be towards the end of the day..

if the leaves are down all the time id say its some other factor besides the light.. still how hard are you blasting your plants?
Anyway as stated the infirmary might well be the best place..

John LOQUE · Feb 15, 2019

These ones have not seen the leds yet and they recover after 8 hours of night. Just before the lights on.

John LOQUE · Feb 15, 2019

Now those who have seen the leds one week, next 600 HPS ( at 1 meter from the canopy) and i tried yesterday a 600 MH but it's not better. Those don't recover anymore at night, they are getting worse every day. So i decided to try fluoros back again but maybe the grow is fucked up. If it does not come from the light, i really don't know. This system has worked many years successfully.

AgentPothead · Feb 15, 2019

That's crazy, I don't get why the light is causing a droop? Is it that much more intense of a light the plants are being pushed into overdrive and using up all the oxygen in the medium? Is your bubbler going 24/7?

John LOQUE · Feb 15, 2019

AgentPothead said:
That's crazy, I don't get why the light is causing a droop? Is it that much more intense of a light the plants are being pushed into overdrive and using up all the oxygen in the medium? Is your bubbler going 24/7?

I know it looks like a O2 deficiency but the air is on 24/7, good air pump, good air stones, lot of bubbles, water is quiet cold.
I do as i always did.

AgentPothead · Feb 15, 2019

I don't know bro

Hopefully somebody who is good at diagnosis sees this and knows what is up. Good luck!

John LOQUE · Feb 15, 2019

AgentPothead said:
That's crazy, I don't get why the light is causing a droop? Is it that much more intense of a light the plants are being pushed into overdrive and using up all the oxygen in the medium? Is your bubbler going 24/7?

Light can stress if the spectrum is bad, and i thought my led's were old and bad. But i tried with brand new led's and i got droopy leaves in final, but i could save the grow that time using my 400 w HPS,

But this grow, i think it's done. I have to re do without using the led's, thet's my own lead...

Douglas.Curtis · Feb 15, 2019

John LOQUE said:
I know it looks like a O2 deficiency but the air is on 24/7, good air pump, good air stones, lot of bubbles, water is quiet cold.
I do as i always did.

What are your minimum and maximum room temps?
What are your min/max nutrient solution temperatures?
What are your max/min humidity levels?
How much airflow do you have through the tent?
What is the total volume of nutrient solution?
How many watts of airpump or how many liters of air per minute is the pump?
Light schedule?
What size space?
300w of What type of LEDs are you using? Spectrum, wattage, number, driving voltages, etc...
:tiphat:

John LOQUE · Feb 16, 2019

The sick plants have been in the dark during 15 hours. They have recovered a little. Now they are under a 125 w CFL light, and they can bare it so far.

John LOQUE · Feb 16, 2019

these ones have not seen the leds and they are fine. They get bigger every day.

John LOQUE · Feb 16, 2019

Douglas.Curtis said:
What are your minimum and maximum room temps?
What are your min/max nutrient solution temperatures?
What are your max/min humidity levels?
How much airflow do you have through the tent?
What is the total volume of nutrient solution?
How many watts of airpump or how many liters of air per minute is the pump?
Light schedule?
What size space?
300w of What type of LEDs are you using? Spectrum, wattage, number, driving voltages, etc...

What are your minimum and maximum room temps?
Min 13°C Max 23 with LEDs 27 with 600 HPS
What are your min/max nutrient solution temperatures?
Min 13 Max 17
What are your max/min humidity levels?
It can change from 55% to 75%
How much airflow do you have through the tent?
The exhaust is good for LEDs but a little weak for 600 w HPS
What is the total volume of nutrient solution?
2 rez of 18 Liters
How many watts of airpump or how many liters of air per minute is the pump?
It's a big pump with 4 outputs, i think it's 30W
Light schedule?
16/8
What size space?
1 square meter
300w of What type of LEDs are you using? Spectrum, wattage, number, driving voltages, etc...
Cree CXB3070 drived at 60W, the max is 100W, 3000K, 5 or 6 Cob's, from 300 to 360 w efficient. They get 36V at 1600 mA each

John LOQUE · Feb 16, 2019

The only thing that i changed is the time the plant stay in the seedling tent.
In this tent, it's 150W CFL and rotative sprinklers, no bubbler. Before they were staying 4 weeks, now i let them stay only 2 weeks. They are younger when i put them under the big LEDs. So this and the fact that it's winter and it's cold, but where the tents are, it's about 15 °C and can go to 18°C.

AgentPothead · Feb 22, 2019

If it's bouncing back under the CFL, that implies it is definitely the LED causing it right? Is Lost in Sog correct and it's just way more light than the plants can safely use?

f-e · Feb 23, 2019

John LOQUE said:
The sick plants have been in the dark during 15 hours..

John LOQUE said:
What are your minimum and maximum room temps?
Min 13°C Max 23 with LEDs 27 with 600 HPS
What are your min/max nutrient solution temperatures?
Min 13 Max 17

Light schedule?
16/8

So 8 hours light, where it might reach 23?

I'm cold just thinking about it.

John LOQUE · Mar 4, 2019

f-e said:
So 8 hours light, where it might reach 23?

I'm cold just thinking about it.

16 Hours of light, not 8.
It's a problem of cold, not at night, but during the day. I prefer paying for light than for heaters, so i prefer using the HPS during cold season.
I had good results under LED's so i can't say it's bad, but regarding my set up HPS give better results. I'll post some new pics soon, the sick plants have recovered nicely. They are under 12/12 schedule and they stretch and thrieve.
600 w were too much, but with 400 w it's just fine.
When it's summer i'll switch back to led's.

Problems with my DIY COB's

Member

Just this guy, ya know?

Member

Attachments

GrassSnakeGenetics

Just this guy, ya know?

GrassSnakeGenetics

Member

Attachments

Member

Attachments

Just this guy, ya know?

Member

Just this guy, ya know?

Member

Autistic Diplomat in Training

Member

Attachments

Member

Attachments

Member

Member

Just this guy, ya know?

Well-known member

Member