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[Aqua Man]

So with me starting to use distilled water now going into flower my ppms of feed im making up from the start point at 0ppm ive gott to 750-800 but putting this through the plants I'm now getting ppm readings of 1500+ is this normal as i was using bad water during veg or something else....

What media again?

If its soil don’t worry about it because the organics in the soil will raise ppm’s a lot.

Runoff is only viable to measure in largely inert media.

It can be used for trending in soil but not on its face value to determine the amount of nutrients in soil.

If its not soil i can help you figure out why

 

[gtb]

I'm in soil (canna terra soil) so all should be ok? Now im using better quality water?

 

[MiGrampa]

I'm in soil (canna terra soil) so all should be ok? Not im using better quality water?

Things should reset themselves but it still might take a few waterings to see noticeable differences between new and old growth. Regardless, you're on the right path.

 

[Aqua Man]

I'm in soil (canna terra soil) so all should be ok? Now im using better quality water?

Yeah ignore runoff ppm.

 

[steamroller]

If you poured 0 ppm water through the soil it would drain in the hundreds of ppm probably if not thousands.
There is stuff in soil that are not in coco or hydro so checking runoff is not real accurate.
Leading to not really wanting much runoff with soil.
If you wanted to use runoff you would need a baseline of what 0ppm water does to the soil and then really you would need to calculate or guess how quick it is being exhausted. Kind of a pain and still not super accurate.
I water till I see a little in the tray or I water X from the top and bottom feed directly pouring in the tray until it sucks up no more.
If there is a little in the tray it helps me now with RH but I don't leave over a 1/4 inch in the tray.
If you have runoff from good soil you are wasting what is in the soil honestly.

 

[gtb]

Hi peeps a lil question? So where the preflowers or 1st hairs showing a female plant in this 1st and 2nd week in ive noticed these are burned/ singed and not a nice healthy white? Maybe to hot with nuits or much light? (Intensity) ill post a couple of pics in the morning when I check on these. Cheers

 

[Aqua Man]

Hi peeps a lil question? So where the preflowers or 1st hairs showing a female plant in this 1st and 2nd week in ive noticed these are burned/ singed and not a nice healthy white? Maybe to hot with nuits or much light? (Intensity) ill post a couple of pics in the morning when I check on these. Cheers

Fan directly on them or anything touching them?

Bush up against them when feeding or touch them?

Any physical contact or to much wind can cause that

 

[gtb]

Will these budding sites now be dead?
Also am I ok keeping humity quite high whens best to start pulling humidity down

 

[Aqua Man]

Will these budding sites now be dead?
Also am I ok keeping humity quite high whens best to start pulling humidity down

No they will be fine… 50-60% should be good

 

[gtb]

So getting this down to the 60% and temp at 26-27 (78-79) my vpd is at 1.4 is this to high? Should I bring temps down or raise humidity to get into correct parameters thanks

 

[Aqua Man]

So getting this down to the 60% and temp at 26-27 (78-79) my vpd is at 1.4 is this to high? Should I bring temps down or raise humidity to get into correct parameters thanks

Are you calculating using leaf temp? I don’t think so… which will make your VPD inaccurate if you don’t

 

[gtb]

Hows best to get an accurate reading for my vpd just im going of what my aci controller tells me?

 

[gtb]

Maybe I'll get a vpd thermometer a hand held one i was just looking at aci hand held device will this give me the actual vpd reading? As it has the leafs temps mode

 

[gtb]

Why do aci controllers have the vpd option on device an app

 

[Aqua Man]

Why do aci controllers have the vpd option on device an app

To give you an idea and like most things cannabis to sell a product

 

[gtb]

So the hand held infared vpd/leaf temp controller would be the better option

 

[Aqua Man]

You need an IR temp gun to calculate it properly. But a reasonable estimate is 5f cooler than air temps for the leaf with LED and 2f cooler than air temps for the leaf with HID

VPD (Vapour Pressure Deficit) Explained by Aqua Man

WHAT IS VPD: VPD stands for Vapor Pressure Deficit. All gases have vapor pressures, but when we’re growing, we’re interested in water vapor. Vapor pressure deficit is the difference between the pressure of water vapor in 100% saturated air at a given temperature (basically a leaf’s vapor...

budbuilders.org

 

[Aqua Man]

So the hand held infared vpd/leaf temp controller would be the better option

Not sure you would have to link it

 

[Aqua Man]

Put the leaf temp in as 5f cooler and see what it gives you. Use this calculator

It will give you the room VPD and the plant VPD which is what we are concerned about

Vapor Pressure Deficit VPD Calculator - Dimlux Lighting - The Best Grow Lights

Vapor Pressure DeficitCalculator Calculate both Room VPD and Leaf VPD automatically Just enter the value below to generate the VPD values for your room and your plants. You’ll need to know the room’s temperature, relative humidity, and the plant’s temperature. We recommend calibrating your...

www.dimluxlighting.com

 

[gtb]

I was looking at this

 

[gtb]

So I've entered these numbers which is my accurate reading im a lil confused with this vpd as ive always gone by that reading

 

[Aqua Man]

So I've entered these numbers which is my accurate reading im a lil confused with this vpd as ive always gone by that reading

Yeah leaf VPD is around .85 to 1. Depending in your actual leaf temp. Notice the room VPD is the sane as your device

 

[gtb]

Indeed thank you pal

 

[gtb]

So looking into the aci controller there is a vpd leaf temperature offset if i was to set this offset to -5f it gives me my vpd reading i need is this correct? 0.81?

 

[Aqua Man]

So looking into the aci controller there is a vpd leaf temperature offset if i was to set this offset to -5f it gives me my vpd reading i need is this correct? 0.81?

Yup perfect but you should get a cheap IR to verify your leaf temps if you want to really be as accurate as possible

 

[Tremojem]

Yup perfect but you should get a cheap IR to verify your leaf temps if you want to really be as accurate as possible

Sooooooo...

Okay, please don't judge my ignorance. But, wouldn't opening the tent to take Leaf Temperatures, affect the Leaf Temperatures?

In other words, my tent (for a random example) temperature is 78F, and my tent RH is 60%.

My Lung Room is 66F, and my Lung Room RH is 36%.

Would it be a fair to assume that the Leaf Temperature inside the tent will have an "X" Value?

Would it not be fair to say, that the "X" Value will change, as soon as the internal environment in the tent is exposed to the Lung Room? Not to mention the leaves being directly exposed to the Lung Room environment.

Sooooooo...what am I doing wrong here? I too, have the ACI Controller. My goal in using its data (temp/rh) is to dial in the VPD, without using extreme settings, and instead, trying to be consistent and on target.

But, the one piece of data I need, but don't have, is Leaf Temperature.

I do have an Etekcity IR Gun. It is not adjustable in any way. I did purchase the ACI IR Gun, but returned it. Useless in the tent with the light on, because it is impossible to read display or see the fucking laser. I actually laughed out loud when I first tried to use it. My Etekcity is flawless in that regard, but am unable to adjust for material or surface sensitivity.

I am excited to learn how to get my Leaf Temperature. And, thank you.

PS...All my gear is ACI, except Photontek X 600W Pro LED Light. I love ACI...period! But, I will be the first to say that they rush devices to market, too fast! In regard to the lamp...that's on ACI too. But that's for another day. I hope to not be banned for this. I warned readers on the shithole forum we were all booted from, for warning about Mars Hydro LED Lights fire risks, that I personally experienced. I did that as a PSA, not knowing the fool who booted me, was in bed with them, lol. Sorry, I refuse to be silent...hope to be here later.

 

[Aqua Man]

Sooooooo...

Okay, please don't judge my ignorance. But, wouldn't opening the tent to take Leaf Temperatures, affect the Leaf Temperatures?

In other words, my tent (for a random example) temperature is 78F, and my tent RH is 60%.

My Lung Room is 66F, and my Lung Room RH is 36%.

Would it be a fair to assume that the Leaf Temperature inside the tent will have an "X" Value?

Would it not be fair to say, that the "X" Value will change, as soon as the internal environment in the tent is exposed to the Lung Room? Not to mention the leaves being directly exposed to the Lung Room environment.

Sooooooo...what am I doing wrong here? I too, have the ACI Controller. My goal in using its data (temp/rh) is to dial in the VPD, without using extreme settings, and instead, trying to be consistent and on target.

But, the one piece of data I need, but don't have, is Leaf Temperature.

I do have an Etekcity IR Gun. It is not adjustable in any way. I did purchase the ACI IR Gun, but returned it. Useless in the tent with the light on, because it is impossible to read display or see the fucking laser. I actually laughed out loud when I first tried to use it. My Etekcity is flawless in that regard, but am unable to adjust for material or surface sensitivity.

I am excited to learn how to get my Leaf Temperature. And, thank you.

PS...All my gear is ACI, except Photontek X 600W Pro LED Light. I love ACI...period! But, I will be the first to say that they rush devices to market, too fast! In regard to the lamp...that's on ACI too. But that's for another day. I hope to not be banned for this. I warned readers on the shithole forum we were all booted from, for warning about Mars Hydro LED Lights fire risks, that I personally experienced. I did that as a PSA, not knowing the fool who booted me, was in bed with them, lol. Sorry, I refuse to be silent...hope to be here later.

Nah the time a tent is open to check leaf temps will not change leaf temps… air temps yes but leaf temps are impacted by root temps, air temps, light, wind etc.

Think of it this way stick a thermometer in the middle of a 1 gal pot and open your tent for 20 min will the temp change? Not a bit

Air temps are influential over time not immediately

 

[Tremojem]

Okay then...good to go.
Thanks

 

[gtb]

Sooooooo...

Okay, please don't judge my ignorance. But, wouldn't opening the tent to take Leaf Temperatures, affect the Leaf Temperatures?

In other words, my tent (for a random example) temperature is 78F, and my tent RH is 60%.

My Lung Room is 66F, and my Lung Room RH is 36%.

Would it be a fair to assume that the Leaf Temperature inside the tent will have an "X" Value?

Would it not be fair to say, that the "X" Value will change, as soon as the internal environment in the tent is exposed to the Lung Room? Not to mention the leaves being directly exposed to the Lung Room environment.

Sooooooo...what am I doing wrong here? I too, have the ACI Controller. My goal in using its data (temp/rh) is to dial in the VPD, without using extreme settings, and instead, trying to be consistent and on target.

But, the one piece of data I need, but don't have, is Leaf Temperature.

I do have an Etekcity IR Gun. It is not adjustable in any way. I did purchase the ACI IR Gun, but returned it. Useless in the tent with the light on, because it is impossible to read display or see the fucking laser. I actually laughed out loud when I first tried to use it. My Etekcity is flawless in that regard, but am unable to adjust for material or surface sensitivity.

I am excited to learn how to get my Leaf Temperature. And, thank you.

PS...All my gear is ACI, except Photontek X 600W Pro LED Light. I love ACI...period! But, I will be the first to say that they rush devices to market, too fast! In regard to the lamp...that's on ACI too. But that's for another day. I hope to not be banned for this. I warned readers on the shithole forum we were all booted from, for warning about Mars Hydro LED Lights fire risks, that I personally experienced. I did that as a PSA, not knowing the fool who booted me, was in bed with them, lol. Sorry, I refuse to be silent...hope to be here later.

What was mentioned on MARS HYDRO lamps?? I'm using the evo4800 smart light by mars... are their products no good i always used a tsw2000 for a few years then last year upgraded to to evo led light? Have these gott a bad review?

 

[gtb]

Whats the correct Vdp range to use when lights are off? As humidity raises?