Aiming 400g 3x3 Runtz Muffin in hydroponics. I have poor sight

Jylhavuori

Jylhavuori

Well-Known Member
Here I find myself once again at rollitup..oh well, why not to share a new small project I recently started.

Sorry for bringing this about as these are already one month old from seed, so lacking pictures.

Girls are now topped once and controlled sideways by bending and supercropping. I broke three main tops from other plant, being careless. They just got into their final tent and are gonna preflower in a couple weeks.

Using a cheap 400W led with infrared though it outputs 1100PPFD which would be suitable for extra CO2. Might get a small bag later... Humidifier also.
Plus there is a blooming panel with low caloric value as an under-canopy light.

Nutrients being used this time are Terra Aquatica Tripart, Flash clean and fulvic acid mix. The plants just got their full dose of nutrients, the water is freshly exchanged. I have some Remo leftovers, gonna use them at blooming phase towards end-sycle of the water reservoir since the Remo- series wont last efficient more than 8 days in bubbler.

Here a couple pics from today.
20250423_110241.jpg
20250424_113025.jpg20250424_112428.jpg

Now it's time to toke some Cream Cookies and chill with freshly tuned stereos. Today, Steven Wilson and Portugal. The Man

I'm gonna be updating this at least weekly so I will be gladly surprised if you join me in this mineral hell of a grow!
 
A bit more info would be in place...
The buckets are 20L/15L, airpump outputs 2x200L/min, big 15cm airstones.

I'm using the net to help spreading, and supercropping the strongest upper branches for hormonal reasons. When supercropping the stems will hold their weight, even with crazy yields - I'm going to remove the net permanently by second week of flowering. This way there will be an even canopy, will avoid the mess of binding wires and I'm able to easily transfer the plants out for maintenance.

Missing a secondary fan and some other climate related stuff, gonna get them next month. A thermometer wouldn't hurt ya know...

Last couple of yields have gone awry(at least got something), mostly because of humidity accumulation. Well, finally that is sorted from the way and I can put some real effort in this one!

I don't know what is it with bubbler, I'm simply not willing to grow in any other media. Can anyone recommend something as easy?? Really??
 
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Plants are looking really good. Love the under canopy light. A researcher for Fluence released a video on YouTube recently with results of their research in under canopy lighting.

Re 1100 - I've grown at 1000-1100 (measured daily using an Apogee) and my experience echoes what Dr Hawley, the researcher at Fluence, discusses. Things go pretty well < 1100 but I've run into issues going higher.

Re. CO2 bag - unless you're in a sealed environment, the air flow through your tent should be such that whatever the CO2 bag emits is immediately removed from the tent.

With the setup that you've got, the equipment is in place to significantly exceed 400gm/sq meter.
 
Delps8 said:
Re. CO2 bag - unless you're in a sealed environment, the air flow through your tent should be such that whatever the CO2 bag emits is immediately removed from the tent.

With the setup that you've got, the equipment is in place to significantly exceed 400gm/sq meter.
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Thanks for the input. I haven't decided yet with the bag though it costs only some 15€ for 3-4 weeks. The tent is in my living room where I also sleep so maybe enough CO2 from me.. There's no active air conditioning but a gravity assisted air ventilation in this building - so the CO2 would linger some period in the room, yes?
 
Some measurements with PPFD meter- app (calibrated)

Screenshot_20250427-094319_PPFD Meter.jpg
Here the current readings. Lights are 19/5hrs, 160W driven, distance of ~20cm. Wouldn't give any more!

Screenshot_20250427-095013_PPFD Meter.jpg Here maximum output of the panel, 400W 12/12hrs, distance ~20cm

Definitely going to get a CO2 bag!
 
It was pruning time. I don't like the phenotype of the left plant, sooo short internodes. Took a couple of clones of the better one, just in case some friend might need a few.


20250427_100058.jpg
Before

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After

20250427_103450.jpgNecessary waste. I always feel bad taking these off


20250427_103404.jpg
Running out of root-it- cubes. The new ones are trash!
 
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Here a full picture of the setup. Atm passive air circulation to raise the humidity. Going to add another fan below the plants, increasing traspiration rate (good response with the fulvic acid which helps nutrient uptake)

The ec is quite high for now, somewhere around 1.6 (I have never owned a meter for it in my 15yrs of growing). I'll change to lower ec once I get the flash clean and start flowering period

And my one of my beloved speakers - I'm an audiophile, running sound processor/dsp in 2.1 system. Man, I can't get enough of music like ever! (Plants like the midbass and sub- frequencies as they create a resonance in the plant matter)

20250428_112709.jpg
Ain't it sweet? My vegetative tent, 80x80cm, resting on wooden planks upon my bathtub. Small appt, gotta max out the space. Fits like a glove...

20250428_112729.jpg
Clones rooting with viparspectra P1000 at 30 Watts. Just plucked them in there a week ago and put the water to 5.8 ph. Doing fine, no roots pushing out yet but they're not in a hurry

If you're growing in DWC/RDWC, I would like to join your thread!
 
Checked ph..
One 4.3 and the other (the bigger one) 5.1.
So the 20Ml/10L of grow was way too much, made nitric acid.
Pulled some 3-5L water out and replaced with fresh water ph raised from 7.1 to 8.0, should do the trick.

In the near future, instead of
(grow-micro-bloom) 20-16-8 I will put 13-12-8 to 10L.
 
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Jylhavuori said:
Thanks for the input. I haven't decided yet with the bag though it costs only some 15€ for 3-4 weeks. The tent is in my living room where I also sleep so maybe enough CO2 from me.. There's no active air conditioning but a gravity assisted air ventilation in this building - so the CO2 would linger some period in the room, yes?
Click to expand...
You're generating far more CO2 than the bag but it's not the limited output from the bag that's the issue.

Insofar as the CO2 staying in the tent, not gonna happen if you've got good ventilation. During lights on, plants are taking in CO2 so, from the perspective of retaining CO2, sealing up the tent would be a valid move. More CO2 is a good idea but that would also mean that you're recirculating (pathogen rich) air that's will tend to have elevated humidity because plants are transpiring. Everything I've read about ventilating grow tents makes me think you're better off bringing in the lower humidity (slightly less pathogen rich) air from outside the tent.

A grower on another site was ragging on me about "not enough fans" so I decided to see if there was a metric for that. I couldn't find any research on optimal air exchange rates in a tent so I went with the best conventional wisdom I could find. This is a PDF from my Excel document but I think the links work, if you want to poke at them.

The data and tables at the bottom are the calculations for my 2' x 4' tent and my 4" fan. That little fan, running at 4/10, will replace all of the air in the tent every minute. Event at 2/10, the entire content of the tent is changed in 3 minutes.
 

Attachments

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Jylhavuori said:
View attachment 5462766
Here a full picture of the setup. Atm passive air circulation to raise the humidity. Going to add another fan below the plants, increasing traspiration rate (good response with the fulvic acid which helps nutrient uptake)

The ec is quite high for now, somewhere around 1.6 (I have never owned a meter for it in my 15yrs of growing). I'll change to lower ec once I get the flash clean and start flowering period

And my one of my beloved speakers - I'm an audiophile, running sound processor/dsp in 2.1 system. Man, I can't get enough of music like ever! (Plants like the midbass and sub- frequencies as they create a resonance in the plant matter)

View attachment 5462767
Ain't it sweet? My vegetative tent, 80x80cm, resting on wooden planks upon my bathtub. Small appt, gotta max out the space. Fits like a glove...

View attachment 5462768
Clones rooting with viparspectra P1000 at 30 Watts. Just plucked them in there a week ago and put the water to 5.8 ph. Doing fine, no roots pushing out yet but they're not in a hurry

If you're growing in DWC/RDWC, I would like to join your thread!
Click to expand...
Looks like a KEF? No wonder the plants (and grower) are happy!

The 1474 reading? Something's not right because, per the manufacturer, that light generates 1080µmol (the PPF). If that's correct, the PPFD is off because PPFD cannot be higher than PPF.

PPF is the amount of light a fixture can generate, PPFD is the amount of light hitting one meter in one second so PPFD has to be lower than PPF.
 
Jylhavuori said:
Alright thanks maybe I'll spare my money then..
Only gonna drive the led 80%/1100PPFD
@Delps8
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That's a lot of light but, if your grow can handle it, the yield is definitely there.

Insofar as quality is concern (meaning levels of secondary metabolites), they're slightly and significantly increased as you go higher from, say, 800 but you're also approaching the level where chances of re-vegging and foxtailing go up. I haven't had a reveg but I think I've run into fox tailing in some of my grows (Gorilla Glue). I say that because some of the colas closest to the light have gotten "horns" on them.

I caught the video from Fluence a couple of weeks ago and took the screenshot here:

1745870707582.png
 
Delps8 said:
Looks like a KEF? No wonder the plants (and grower) are happy!

The 1474 reading? Something's not right because, per the manufacturer, that light generates 1080µmol (the PPF). If that's correct, the PPFD is off because PPFD cannot be higher than PPF.

PPF is the amount of light a fixture can generate, PPFD is the amount of light hitting one meter in one second so PPFD has to be lower than PPF.
Click to expand...
Their measure were taken 30cm (area 120x120cm) away from the panel but even with 15cm away can be used on my tent (90cm). The panel is 80x80cm

Yep my beloved Q750's
 
Jylhavuori said:
Their measure were taken 30cm (area 120x120cm) away from the panel but even with 15cm away can be used on my tent (90cm). The panel is 80x80cm

Yep my beloved Q750's
Click to expand...
Got it.

The 1080 value is for the Grow King.

The QB750, as in the 750 watt light? That's a "big honkin' light"!
 
Delps8 said:
The QB750, as in the 750 watt light? That's a "big honkin' light"!
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Nono, it was my KEF's model name!

"Their measure", as in the grow king company. Certainly a lower PPF than in my smaller space. The outer rims output really poorly at 30cm/1,44m² whereas I'm having it 20cm/0,81m². The intensity grows quite rapidly when closing the distance. Manufacturer states that 15cm distance can be used safely, in which they have not measured data(ikd why).

I hope this clarified it.
 
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Screenshot_20250429-095458_Drive.jpg
120x120cm (1.44m²) is quite unreasonable area for a 80cm/400W panel...should have been measured at 1m² covering also the lowest distance. In that case, they could have much higher PPF published.
 

"Aiming 400g"​

Jylhavuori said:
Their measure were taken 30cm (area 120x120cm) away from the panel but even with 15cm away can be used on my tent (90cm). The panel is 80x80cm

Yep my beloved Q750's
Click to expand...

Nice you should be able to shit it in going for 400g if you have a good strain and a 120 x 120 tent.
I just grew 800g of Green Crack dry bud weight in a flood and drain system controlled via a Bell Syphon so yo should do alright .
:cool:

Im in for the show if you'll have me.
 
Absorber said:

"Aiming 400g"​



Nice you should be able to shit it in going for 400g if you have a good strain and a 120 x 120 tent...
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Thanks and feel welcome!
Sadly its only 90x90cm tent.. going to drive the led 320W/1000-1100PPFD.

And the strain - from the 4 plants I've grown Runtz Muffin it hasn't shown any great characteristics in bloom strething. Quite compact buds so far. But, I've had some problems with overall humidity of the appartment in the latest runs.
Let's see if I'm able to go >300 grams with plants being ~45 days from sprout when blooming begins. Targeting 100 days of lifetime.
 
Jylhavuori said:
Thanks and feel welcome!
Sadly its only 90x90cm tent.. going to drive the led 320W/1000-1100PPFD.

And the strain - from the 4 plants I've grown Runtz Muffin it hasn't shown any great characteristics in bloom strething. Quite compact buds so far. But, I've had some problems with overall humidity of the appartment in the latest runs.
Let's see if I'm able to go >300 grams with plants being ~45 days from sprout when blooming begins. Targeting 100 days of lifetime.
Click to expand...
Have you got yourself a good dehumidifier ? Its a must .
I run a lung room with 2 tents and extraction from the tents is controlled via temp and humidity drawing air from lung room that has the dehumidifier and AC in it .
 
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