4x4 RDWC Granddaddy Purple LED Grow

[ҖҗlegilizeitҗҖ]

Hey everyone! Excited to kick this grow off.
I'm running
Spiderfarm SF4000
5.3g square grow buckets
12 gallon rez
25 gallon storage barrel (total of about a 24 gallon system)
1.5" PVC with bulkheads
865 GPH Quiet-One water pump
Eco Air5 1300 GPH airpump
Complete Cultured solutions line
RO water made through a 6 stage RO and DI filter
A sealed room
A 14,000 BTU Haire Portable AC
Waykar 40 Pint Dehumidifier
Supplemented CO2 throughout
Using Vivosun Regulator and C02 meter
Bluelab Guardian monitor
Bluelab PH Doser
One 6" AC infinity intake for intake and one for exhaust, both wired together to work in unison according to my pre-set temp and humidity in the tent.
4 GDP Fem seeds from ILGM popped November 10th
Top off for my storage barrel is using a PVC float valve
Top off for my Rez system is also another PVC float valve, which connects to the storage barrel.
Next purchase will be a chiller, I'm confident there is no light leaks in my system, but I am already reaching water temps of 75







These are the exact parameters I will be aiming for initially, then I will tweak it to my needs.

 

[ҖҗlegilizeitҗҖ]

Day 5 and things are doing decent, I have two major issues Im looking at right now though. First, 2 of my 4 plants are already yellowing like they have a nitrogen deficiency. I didn't think they would need much of any nutrients untill atleast day 7, so thats why I'm running only 0.2 EC (150 ppm). I am thinking that they might be just growing very fast, and haven't filled in complely with nitrogen yet. We will see.



The second big issue is water temp is steady sitting around 77 during the day. I do not have the money for a chiller right now, so hopefully I dont get any alge or root rot before then.
My rez is pitch black, and I've taped all the PVC pipes to make sure they also don't allow light in. In addition with Cultured solutions, UC roots gives me a sterile rez. I will just have to top up every few days with that, or some hydrogen peroxide I think.

 

[myke]

I would drop pH to 5.7.You dont have C02 on do you?
Small seedlings need humidity ,i would up that a lot.

 

[.Smoke]

Looks good.
Fyi the GDP from ILGM is a helluva good buzz. I just harvested one about 2 weeks ago.
She also like to grow a lot during stretch.
Here was mine the day she got flipped after 4 weeks of veg...(front right)


This was her on chop day 70 of flower.

Best of luck!

 

[myke]

Your always going to have high water temp.Look at how much water is in your 79deg tent.
Lower tent temp to 72.

 

[ҖҗlegilizeitҗҖ]

Your always going to have high water temp.Look at how much water is in your 79deg tent.
Lower tent temp to 72.

No actually with co2 optimal temp right now is 81, and I always follow my VPD chart for humidity (try to, and I stay on the higher end of the chart for seedlings like you said) I actually already ordered a humidifier off Amazon two days ago, It will be here Monday, right now I'm shooting for 81° and 75% RH.
I posted this above, but here again it the parameters im trying to go by.

 

[ҖҗlegilizeitҗҖ]

I would drop pH to 5.7.You dont have C02 on do you?
Small seedlings need humidity ,i would up that a lot.

Also, in veg a little higher PH can help pick up more essential nutrients to that stage of life. Like this chart depicts, you then lower the PH level slowly through flower untill the last half of flower your at 5.7

 

[myke]

I was thinking a 2L plastic bottle cut in half for little domes

 

[myke]

Thats also a lot of light isnt it? my seedlings get 24 watts until 2-3 nodes.

 

[ҖҗlegilizeitҗҖ]

I was thinking a 2L plastic bottle cut in half for little domes

I am also top feeding 50ml of their rez water once a day until their roots are established.
Still not sure why the one is turning slightly yellow, too wet? Not enough nutrients? Growing too fast for nitrogen? Hmm

 

[ҖҗlegilizeitҗҖ]

Thats also a lot of light isnt it? my seedlings get 24 watts until 2-3 nodes.

I have the LED turned down to 40% power, and I really am not afraid to push these plants long as I don't get any adverse effects. So far they seem to be responding great, except the yellowing on the two.

 

[ҖҗlegilizeitҗҖ]

Looks good.
Fyi the GDP from ILGM is a helluva good buzz. I just harvested one about 2 weeks ago.
She also like to grow a lot during stretch.
Here was mine the day she got flipped after 4 weeks of veg...(front right)
View attachment 4743146
View attachment 4743140
This was her on chop day 70 of flower.
View attachment 4743153
Best of luck!

I'm hoping for some monsters, I plan on using a double trellis and letting them run. With a 7' tent, and the ultra thin LED, these easily have 4.5' of canopy space before they outgrow the tent.
I also have been considering supplementing the tent with a Spiderfarmer sf 2000 for flower to help push up my ppfd spread better. First though I think I'm going to need to spring for the chiller (one I'm looking at is $375)

 

[myke]

I have the LED turned down to 40% power, and I really am not afraid to push these plants long as I don't get any adverse effects. So far they seem to be responding great, except the yellowing on the two.

What I was trying to say/hint is your light is way to close your water temp is way to high. Your poor seedling is suffering a Mg deficiency because there’s too much light.
Also I see the way the water flows.From one tote to next etc. This isn’t ideal.Ea tote should drain into a main that goes back to the res. The shorter amount of time in your tent the better. I’d also make your res much bigger so it can keep cooler. I’d say for sure you’ll need a big chiller soon. Like yesterday.

 

[ҖҗlegilizeitҗҖ]

What I was trying to say/hint is your light is way to close your water temp is way to high. Your poor seedling is suffering a Mg deficiency because there’s too much light.
Also I see the way the water flows.From one tote to next etc. This isn’t ideal.Ea tote should drain into a main that goes back to the res. The shorter amount of time in your tent the better. I’d also make your res much bigger so it can keep cooler. I’d say for sure you’ll need a big chiller soon. Like yesterday.

I think that's obvious I need lower water temps, but there's nothing I can do about it untill I can dump another 400 into this grow.. and the circulation method of my RDWC is extreamly common. A full individual drain system wouldn't work for my area.
Plants can absorb a substantial amount more light without issues like light burn using CO2 enrichment, I have a light meter and its only reading 350 ppfd at the plants either way.
At ambient co2 levels, a mature plant can absorb up to 800 ppfd. With co2 enrichment its boosted to 1200 ppfd.
I wouldn't think the seedlings would be struggling under only 350.

 

[ҖҗlegilizeitҗҖ]

What I was trying to say/hint is your light is way to close your water temp is way to high. Your poor seedling is suffering a Mg deficiency because there’s too much light.
Also I see the way the water flows.From one tote to next etc. This isn’t ideal.Ea tote should drain into a main that goes back to the res. The shorter amount of time in your tent the better. I’d also make your res much bigger so it can keep cooler. I’d say for sure you’ll need a big chiller soon. Like yesterday.

In addition, I doubt its a mg deficiency, that is expressed on the leaf as interveinal chlorosis, my leafs are yellowing in an opposite fashion. Mg is also typically locked out when the PH is too low, but I'm floating about 6.2
With the lights at only 350 ppfd (led dimmed down substantially) the only reason I would have any deficiency is too low of an EC. But even then, the endosperm in the seed should be sustaining the plant for atleast its first week.

 

[myke]

Im going by that one pic,looks like the light is only 18" or so above?I dont know your light but it appears too close.Any who Good luck.

 

[ҖҗlegilizeitҗҖ]

Im going by that one pic,looks like the light is only 18" or so above?I dont know your light but it appears too close.Any who Good luck.

Well, like I mentioned, my light has a dimmer that turns it from 100% power all the way down to 15%.
The light is at about 18" but turned wayyy down. Its putting out around 500 in the center but 350 on the edges with the plants. It is only drawing about 175 watts out of is 450 at full power.

 

[ҖҗlegilizeitҗҖ]

Here is each of my girls, you can see only two have yellow, the other two look good but are a bit smaller.
I also go my humidifier in today and will be pushing the tent up to 75% RH

 

[ҖҗlegilizeitҗҖ]

I've got the humidifier set on during the day, and the dehumidifier set on during the night.
Exhaust fans also kick on over night because humidity inside the tent seems to go through the roof once lights turn off which is the opposite of what I want.
But, I think I finally got the environment for veg dialed in and things are running great.
I haven't checked on the girsl yet today, but I enjoy I can still check on things with my sensor push. I also have my schedules for my environment controllers ran through smart outlets and to my phone.

 

[ҖҗlegilizeitҗҖ]

Welp I have been.keeping an eye on them, three have been looking better but the fourth was getting worse. Two were showing signs of nute burn. So I flooded all of them to clean anything out, and I'm only running 150 ppm...
But I gave them a splash of clonex diluted in water and this happened.... not sure why... but I flushed again and we will check back in a few hours....
Also, I found out 5 gallon buckets fit in my brain tank, so I froze a few and am putting them in there to lower water temps untill my chiller arrives.



Here is a pic from before the clonex

And after