1st Indoor Grow DWC LED Dos Si Dos 33

Chris P Bacon · Feb 10, 2020

Hi all, I wanted to create a diary of my first indoor grow, I will be using a top fed DWC that I made and will be growing in a 1.5mx1.5mx1.8m GreenQube roof tent. My setup can be seen here https://www.icmag.com/ic/showthread.php?t=368620

I will also be journaling my grows on Grow Diaries and this one is at https://growdiaries.com/diaries/50098-barney-039-s-farm-dos-si-dos-33-grow-journal-by-doofus-mcfluro

I have two identical tents like this in one room.

Planted eight seeds in rockwool and placed in DWC with pumps off and fed with 5.5pH 50/50 water and ran the temp at 25°C with RH 55%. 2x300w LEDs on 24hrs.

Six seeds popped up on the morning of day 3 whereupon the humidity was raised to 70%

More to come...

high4twentydays · Feb 10, 2020

Nice clean setup. Digging it! What kind of lights are those?

Insomniac420 · Feb 10, 2020

Great setup

Douglas.Curtis · Feb 10, 2020

Looking nice and clean.

Your res temps stay just below 20c, yes?

Chris P Bacon · Feb 10, 2020

Thanks for the replies guys. The lights are Electric Sky 300s from https://thegreensunshineco.com

Douglas, I am not exactly certain as I have no temp control on the rez so I am assuming that it will eventually equalise to the room in the low 20s. Currently I am having to heat the tent rather than cooling it so hopefully the rez temp will not be an issue.

Douglas.Curtis · Feb 11, 2020

Chris P Bacon said:
Thanks for the replies guys. The lights are Electric Sky 300s from https://thegreensunshineco.com

Douglas, I am not exactly certain as I have no temp control on the rez so I am assuming that it will eventually equalise to the room in the low 20s. Currently I am having to heat the tent rather than cooling it so hopefully the rez temp will not be an issue.

Yikes, you'll want to be absolutely sure of your res temps. Though you're top feeding, which will constantly supply oxygen to the exposed roots, the roots in solution will have oxygen issues at higher than 20C temps.

Above 18.4C and below 20C at all times, and you'll be great.

Trust me, after 15+ years of indoor hydro (mostly DWC), you don't want to be fiddling around with h202 or other sterilizing methods. Keep the temps accurate and you'll be fine.

Should you find temp control a no-go, I recommend switching to drip through clay pebbles.

They can tolerate up to mid 30'sC

Personally, I flower at around 20C and 15-20% humidity. Absolutely crushes the quality from hot/wet flowers.

Chris P Bacon · Feb 12, 2020

Hi Douglas, thanks very much for the advice. I just took a temp reading with a laser thermometer and the solution was 21.7°C or at least the bottom of the rez was.

When you say dripping through clay pebbles, isn't that what I am doing essentially as I have the small rockwool cubes set in clay pebbles and the drip hose is feeding into the pebbles?

What method would you suggest for cooling my 100L rez a couple of °? I really don't fancy splashing out for a couple of water chillers for both my tents. I did see this https://www.youtube.com/watch?v=tnKlIc6oCCg homemade Peltier chiller that might be effective and efficient or something like this off the shelf one https://www.ebay.co.uk/itm/144W-Thermoelectric-Peltier-Refrigeration-TEC1-12706-Cooler-water-cooling-System/173219597843?_trkparms=aid%3D555018%26algo%3DPL.SIM%26ao%3D1%26asc%3D225076%26meid%3D809d234ea46a4635b40e7176f6d0c13d%26pid%3D100005%26rk%3D3%26rkt%3D12%26mehot%3Dag%26sd%3D312939916157%26itm%3D173219597843%26pmt%3D1%26noa%3D0%26pg%3D2047675&_trksid=p2047675.c100005.m1851. Alternately I could get a small fridge and run 50m of hose through it and back to the rez, that way one fridge could service both tents.

I did setup a 600mg/h ozone generator attached to a 100mm ceramic airstone to give the rez a daily blast during the night cycle (to avoid getting ozone in the stomata) to help with oxygenation.

Do you start at 20°C during flowering or do you gradually lower the temp through the flowering stage?

Chris P Bacon · Feb 16, 2020

At day 10 now and 100% of the seeds have geminated but a couple were very slow. Some of them are looking a bit ropey with drooping leaves and one tends to lean over in various directions. I have dimmed and raised the lights somewhat.

I will eventually be whittling down to the best four.

I originally set my EC to 1.1 but the pH Down boosted it up to 1.2 so I am going to cut it back soon. Realised my pH Down was phosphorus based so I will be switching to a nitrate-based one soon, as I think it's getting too much phosphorus as my nutrient regime is KISS MaxiBloom.

Any advice greatly appreciated. Sorry, they are not the best of photos.

Chris P Bacon · Feb 21, 2020

Day 14 and their leaves are still not looking great. I have raised the lights and am dialing back the EC which is currently at 1.1 after the last adjustment. I will be exchanging 10l from the rez at the next inspection to do this.

MagusMind · Feb 24, 2020

Great looking seedlings.

Chris P Bacon · Feb 25, 2020

Thanks MagusMind. I wasn't happy with the way that some of the leaves curled up slightly, not sure why but as a cautionary measure I have raised the lights and dialled back the EC to 1.

Latest pics day 19. Starting growth from the 3rd node.

MtnGanj · Feb 25, 2020

Good luck - that’s an ambitious first indoor run. Good think there is no shortage of veteran support around here!

Chris P Bacon · Feb 25, 2020

Here are some logging charts.

This one is for the rez.

EC and changes.
PH and changes.
Solution usage in mm.
Rez temp.
Light height to canopy.

This one is for growth of the four best plants so far, the other three (culled one yesterday) are pretty similar to the smaller ones.

Height and girth.

Chris P Bacon · Feb 25, 2020

MtnGanj said:
Good luck - that’s an ambitious first indoor run. Good think there is no shortage of veteran support around here!

Thanks. I am happy to have found this place and the wealth of knowledge contained within. Big thanks to the team behind it.

Chris P Bacon · Feb 26, 2020

Day 20.

Day temp 24°c
Night temp 20°c
Rez temp 20°c
RH 70%
EC 1 Maxibloom KISS
Tap water EC 0.6 pH 8.23
PH 6.18 (ph down phosphoric acid)

I look to be getting a calcium deficiency?, which is a little surprising to me as I have fairly hard water. I am wondering if it is due to me using a phosphor based pH down and I am getting some lock out. I originally mixed the Maxibloom to 1.1 EC, however, after adjusting the pH the EC went up to 1.2. I have dumped 15 litres and refilled with straight tap water bringing my EC to 1 and raising pH to just above 6.

Is this a matter of adding some calmag and using a nitrate based pH down or removing some more solution and replacing with nitrate pH downed tap water?

I don't have a RO device and use tap in reference to this thread: https://www.icmag.com/ic/showthread.php?t=23357

Cheers.

Chris P Bacon · Feb 27, 2020

Day 21

Day 21

Day 21

The most vigorous plant gained 10 cm of leaf span in the last 24 hrs.

These leaves are very green and have slight mottling, which might be an early signs of the rust spots from the previous days pics in last post.

There is some red hints in the leaf stems.

These two are backup plants and might be culled later.

I would like to know what is going on with the leaf on the righthand plant that is curling inwards.

Any help identifying what is going on would be a great and very appreciated, thanks.

These are all the feminised Dos Is Dos 33 from Barney's Farm

PurplePotion · Feb 28, 2020

They’re still so young, I wouldn’t stress. How are the roots developing? As long as your root system is taking hold and looking healthy at this point I wouldn’t sweat anything. :tiphat:

PurplePotion · Feb 28, 2020

double post sorry

Chris P Bacon · Feb 28, 2020

Thanks for taking the time to help out PurplePotion.

The plants are looking fantastic other than the things I mentioned and growing well. The spots have not got any larger and the roots look healthy.

Mars Hydro Led · Feb 29, 2020

She looks healthy so far. Cannot wait to see her mature look. Good luck. :tiphat:

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