Can anyone identify this leaf issue?

[NairnM16]

Okay I looked at wrong photo lol but treat the room not the tent looks like poor condition to me looks overwatered

 

[Aqua Man]

Defoliate the leafs leds keep humidity hight canopy that packed with that high humidity my money’s on mildew trim the canopy expose the buds you’re lights not that strong use it’s full potential

Okay I looked at wrong photo lol but treat the room not the tent looks like poor condition to me looks overwatered

Huh how does led make a room more humid? How is it overwatered in DWC?

 

[Aqua Man]

I hate myself for posting on AN nutes but here goes.

DO NOT PH ADJUST PH PERFECT nutrients. Add based on ppm toss the ph meter to the side and do not adjust. Of it goes way out change the res. Do not add cal mag these nutes are designed for RO and contain all you need. They should always be kept above 400ppm so that the concentration is high enough to adjust ph.

For that plant size 600ppm is plenty if your transpiration rates are good... with your humidity possibly causing issues in that area.

Your root look great so no issues there.

Water tenps below 74f and ideally 72-74f for best growth.

Air temps 75-80f if you are in single buckets I suggest 75f so you can keep res temos in check.

50-60% humidity should be good. You may need to increase air exchange to reach this. Don't forget about microclimates around the leaves. Just above that hydroton is going to be a high humidity area and you need some airflow to move it away from the plants. Cleaning up the bottoms will really help.

Look into VPD for an explanation of how temp and humidity affect nutrient uptake... especially in hydro with faster growth. It doesn't need to be perfect but the close the better.

VPD (vapor pressure deficit)

Ok i was gonna sit down and write out a whole article but i have been lazy so instead instead I'm going to copy paste because im lazy. This is not my work so let start. You may find this very long but its worth the read. Some may want to skip ahead. I have added here and there to what i feel is...

www.thcfarmer.com

 

[NairnM16]

Huh how does led make a room more humid? How is it overwatered in DWC?

No clue but I’ve had problems with high humidity problems using leds

 

[longjonlebon]

I hate myself for posting on AN nutes but here goes.

DO NOT PH ADJUST PH PERFECT nutrients. Add based on ppm toss the ph meter to the side and do not adjust. Of it goes way out change the res. Do not add cal mag these nutes are designed for RO and contain all you need. They should always be kept above 400ppm so that the concentration is high enough to adjust ph.

For that plant size 600ppm is plenty if your transpiration rates are good... with your humidity possibly causing issues.

Your root look great so no issues there.

Water tenps below 74f and ideally 72-74f for best growth.

Air temps 75-80f if you are in single buckets I suggest 75f so you can keep res temos in check.

50-60% humidity should be good. You may need to increase air exchange to reach this. Don't forget about microvlimates around the leaves. Just above that hydroton is going to be a high humidity area and you need some airflow to move it away from the plants. Cleaning up the bottoms will really help.

Look into VPD for an explanation of how temp and humidity affect nutrient uptake... especially in hydro with faster growth. It doesn't need to be perfect but the close the better.

VPD (vapor pressure deficit)

Ok i was gonna sit down and write out a whole article but i have been lazy so instead instead I'm going to copy paste because im lazy. This is not my work so let start. You may find this very long but its worth the read. Some may want to skip ahead. I have added here and there to what i feel is...

www.thcfarmer.com

Oh man, this is awesome info! Thank you so much. I've just been looking at VPD and I defo need a better solution for reducing humidity. For the moment I'll keep the flap open as this keeps it around 70%.

This is grow 3 and humidity has been an issue every time (but has manifest in a slightly different issues each time). I've got crop, and quite a big one on grow 2, so its heading in the right direction...slowly...

Love you guys!!

 

[Aqua Man]

Oh man, this is awesome info! Thank you so much. I've just been looking at VPD and I defo need a better solution for reducing humidity. For the moment I'll keep the flap open as this keeps it around 70%.

This is grow 3 and humidity has been an issue every time (but has manifest in a slightly different issues each time). I've got crop, and quite a big one on grow 2, so its heading in the right direction...slowly...

Love you guys!!

Best way is a bigger exhaust fan to exchange more air. Just making sure here.. you do have an exhaust fan and passive air intake right?

 

[longjonlebon]

Best way is a bigger exhaust fan to exchange more air. Just making sure here.. you do have an exhaust fan and passive air intake right?

hmmmmm...well....no...but googling them right now!

 

[Aqua Man]

hmmmmm...well....no...but googling them right now!

Ok well thats your problem.... no air exchange equals high humidity, poor transpiration and lack of co2... 100% your biggest issue.

 

[longjonlebon]

Ok well thats your problem.... no air exchange equals high humidity, poor transpiration and lack of co2... 100% your biggest issue.

Cool dude. So What sort of thing would you recommend?

 

[Aqua Man]

Cool dude. So What sort of thing would you recommend?

What size tent?

 

[longjonlebon]

What size tent?

1.2mx1.2mx1.8m

 

[longjonlebon]

HighPro Inline Fan

HighPro Inline Fan - Suitable for fresh air into your grow room/ tent, Ideal for extraction, Use for in/out take

hyjo.co.uk

 

[longjonlebon]

@Aqua Man - Thanks!!!!

 

[Aqua Man]

HighPro Inline Fan

HighPro Inline Fan - Suitable for fresh air into your grow room/ tent, Ideal for extraction, Use for in/out take

hyjo.co.uk

Is this what you have?

I would recommend this if you can. You can set the humidity and the fan will run to keep it close to the setpoint as long as the humidity in the room the tent sits in is lower than the setpoint.

I just plucked from a UK site since I think by the link you posted thats where you are.

It what I would recommend but anything is better than nothing so up to you.

https://vividled.co.uk/shop/ols/products/ac-infinity-cloudline-t4-quiet-inline-duct-fan-system-with-temperature-and-humidity-controller-4-inch

 

[Aqua Man]

@Aqua Man - Thanks!!!!

I just got lucky on a hunch lol... figured I should ask instead of assume.

 

[longjonlebon]

I just got lucky on a hunch lol... figured I should ask instead of assume.

Oh, one more really dumb question. Do I need two fans, and inlet and an outlet, or does the out take care of its self?

 

[Aqua Man]

Oh, one more really dumb question. Do I need two fans, and inlet and an outlet, or does the out take care of its self?

I exhaust then open the intake flaps on the bottom of the tent so as the fan pushes air out it passively draws it in through the bottom flaps

 

[longjonlebon]

I exhaust then open the intake flaps on the bottom of the tent so as the fan pushes air out it passively draws it in through the bottom flaps

I have actually been wondering what those flaps were for...magic...rofl

 

[Flexnerb]

Hey, more pics here.

Nutrients - Advanced Nutrients 3 part (Grow / Micro / Bloom). Following the feeding chart for week 6. I used Great White Micorrhiae in the first few weeks for root development.

18/6 lighting with a Mars Hydro ts1000.

No real changes. I topped up the solution two days ago so thinking I might flush them for a few days?

Im wondering if that center leaf in the bottom pic that's burning inwards isnt a high N zinc antagonism issue? Im also wondering if an Mg antagonism/stimulstion issye would show up first