Indoor RDWC Grow - Failure at every turn

JMek420

Member
Right,
So im about to just completely kick DWC and instead make my move into coco.
I will give it one last go though and ask you guys to see if maybe you can come up with a reason why this f**cking system does not want to work for me,

So my very first grow was a simple one. It was when I was just starting so had very little funds.
It consisted of:
Tank/Rain Water (ppm of ~ 20)
600w HID + 2x200W LED
Grow Tent
4 stand alone DWC buckets (white)
DutchMaster Gold Hydroponic Nutrients. No additives apart from Zone/Add.27.
4 port Air Pump delivering approx 2.5 LPM to each bucket,

I had NO chiller or exhaust fan. This grow happened spring-summer in Australia.
The ambient temps would be about 26-38 degrees celsius. (About 96 faranheight)
Sometimes the temps in the tent would hit 40+ celsius
I repeat. I had NO chiller. I never checked water temperature. Never added chlorines or bleach.
The strain was AK-48.
I had a rather successful first grow. I pulled about 10 ounces from 3 plants (1 died, and 1 of those 3 was also picked early, so more like 10 ounces from 2 plants.)

Now, fast forward.
I moved house and set up a RDWC thinking "well if that was my first grow and I hardly controlled a thing, shits about to get real"
I upgraded and bought myself an exhaust fan, carbon scrubber and a 1/2HP aquarium chiller.
I shit you not, since I have moved house NOTHING has gone right.
Water temperatures sit at 17-19 degrees celsius (They dont get higher, the chiller kicks in automatically)
I bought all black buckets to prevent light leaks.
I also use black trash bags over the top of the bucket to keep any light from leaking in at all.
I have a single rez control bucket, which is automatically set to cycle the water from the rez to all 4 buckets once an hour.
The water level sits about 4 inches below the net pots. When the pump kicks over, it raises the water level in each bucket to just below the net pot for 15 minutes before draining back into the control bucket and leveling out.

I also bought another air pump to increase oxygen levels, and can safely say there is approx 40 LPM being pumped into the system over all (1 air stone in each bucket, 2 in the control tank)

My reward for going into so much effort and spending approx 500$ on all these things to better control my grow?

Root rot.
Every fucking time, its root rot.
The roots are healthy and fuzzy and white when emerging from the bottom of the net pot each time.
As soon as they begin to sit in the water, they start to get some sort slime on them, go brown, stop growing and my plants start going down hill. They get signs of under feeding as well as getting signs of nitrogen toxicity and fert burn on the leaves, purple leaf stems, seriously slow growth.
And the roots just do not grow any bigger.
Its like the water is poison to it or something.

This has happened to me the last 3 grows.
Could it just be my area? Have I moved somewhere that hydro just isnt going to work for me?
Ive tried pythoff, ive tried benes, ive tried a chiller ive tried blacking out and light proofing.
Nothing has worked.

Any ideas guys? Im ready to say fuck DWC and go to coco, as it seems much easier and less stressful at this point.
 

Olive Drab Green

Well-Known Member
Right,
So im about to just completely kick DWC and instead make my move into coco.
I will give it one last go though and ask you guys to see if maybe you can come up with a reason why this f**cking system does not want to work for me,

So my very first grow was a simple one. It was when I was just starting so had very little funds.
It consisted of:
Tank/Rain Water (ppm of ~ 20)
600w HID + 2x200W LED
Grow Tent
4 stand alone DWC buckets (white)
DutchMaster Gold Hydroponic Nutrients. No additives apart from Zone/Add.27.
4 port Air Pump delivering approx 2.5 LPM to each bucket,

I had NO chiller or exhaust fan. This grow happened spring-summer in Australia.
The ambient temps would be about 26-38 degrees celsius. (About 96 faranheight)
Sometimes the temps in the tent would hit 40+ celsius
I repeat. I had NO chiller. I never checked water temperature. Never added chlorines or bleach.
The strain was AK-48.
I had a rather successful first grow. I pulled about 10 ounces from 3 plants (1 died, and 1 of those 3 was also picked early, so more like 10 ounces from 2 plants.)

Now, fast forward.
I moved house and set up a RDWC thinking "well if that was my first grow and I hardly controlled a thing, shits about to get real"
I upgraded and bought myself an exhaust fan, carbon scrubber and a 1/2HP aquarium chiller.
I shit you not, since I have moved house NOTHING has gone right.
Water temperatures sit at 17-19 degrees celsius (They dont get higher, the chiller kicks in automatically)
I bought all black buckets to prevent light leaks.
I also use black trash bags over the top of the bucket to keep any light from leaking in at all.
I have a single rez control bucket, which is automatically set to cycle the water from the rez to all 4 buckets once an hour.
The water level sits about 4 inches below the net pots. When the pump kicks over, it raises the water level in each bucket to just below the net pot for 15 minutes before draining back into the control bucket and leveling out.

I also bought another air pump to increase oxygen levels, and can safely say there is approx 40 LPM being pumped into the system over all (1 air stone in each bucket, 2 in the control tank)

My reward for going into so much effort and spending approx 500$ on all these things to better control my grow?

Root rot.
Every fucking time, its root rot.
The roots are healthy and fuzzy and white when emerging from the bottom of the net pot each time.
As soon as they begin to sit in the water, they start to get some sort slime on them, go brown, stop growing and my plants start going down hill. They get signs of under feeding as well as getting signs of nitrogen toxicity and fert burn on the leaves, purple leaf stems, seriously slow growth.
And the roots just do not grow any bigger.
Its like the water is poison to it or something.

This has happened to me the last 3 grows.
Could it just be my area? Have I moved somewhere that hydro just isnt going to work for me?
Ive tried pythoff, ive tried benes, ive tried a chiller ive tried blacking out and light proofing.
Nothing has worked.

Any ideas guys? Im ready to say fuck DWC and go to coco, as it seems much easier and less stressful at this point.
Great White and Hydroguard.
 

JMek420

Member
I have great white and tried it this grow. It just made the water dirty, smell bad and the problem worse from what I could tell.
 

JMek420

Member
Pics for reference.
The big plant is approx 4 weeks old.
The smaller 3 are approx 3 weeks old.

The root picture is a picture of the bigger plants roots.
The 3 smaller plants have very little roots coming from the pot, and the ones that have emerged have seemed to folded back onto themselves and are brown/dead.

1.jpg 2.jpg 3.jpg 4.jpg
 

JMek420

Member
Roots are mildly slimy, and break away easily even if gently touched.
The lighting makes it hard, but they are a dirt brown color.
Also notice the buildup of crap on the bucket water line.
 

JMek420

Member
Anyone?
Can no one tell me how this is failing so consistently when, as far as I can tell, i've created pretty much 'ideal conditions'?
 

Airwalker16

Well-Known Member
You're nute soup looks like it's curdling and leaving a film on the walls. You can NOT let your water sit stagnant for an hour, then pump into the buckets. It needs to be in CONSTANT MOVEMENT always. Also, use nutri-life 29% h2o2. Fuck all the hydroguard, white shark, pool shock bs. H2o2 is all you need. Switch your nutes to general hydroponics 3 part series micro,grow, and bloom and use their line of cal mag calimagic. Follow the chart I'll post, do the things Ive told you, and you will have success. Recirculating-Nutrient-Schedule-custom-sm.jpg
 

JMek420

Member
Hey! Thanks for the reply.
The soup doesnt actually sit stagnant, each bucket is constantly turbulated by the airstones (Each bucket looks like it is boiling all the time)
The only thing the recirculating pump does it exchange the water in the plant buckets with cold water from the chilled control bucket once an hour.
I tried using h202 last grow. (Not this current grow) It didnt help much either.
Whats wrong with DutchMaster nutes?
I also have AN Jungle Juice 3 part
 

JMek420

Member
This may sound bad, but I have actually used a small amount (1 ml to 60 litres) of pool strength algaecide it killed the growth on the roots as far as I can tell...
Do you think this root problem now is just the algaecide killing the roots?
 

Airwalker16

Well-Known Member
Well there's your problem.
Get that water moving all throughout your system. Build a new one even. Have an air pump with an airline and air stone in EACH bucket like youre doing already. (But buy new ones cause yours probably harbor spores) I use a submersible pump from the res, up to a "wye", then lines to the top of each bucket with "tees" in them to create a waterfall in each one. The bottom of each bucket has a much wider diameter RETURN line that returns back to the res just with gravity. As the res emptys from pumping the water, the buckets fill and level out back to the res to keep the water line LINEAR with the ground. Mini uses 5/16" supply and 1/2" returns. Big one is 1/2" supply & 1" returns.
These pics are in my MINI set up but I do it on a 5 gallon bucket system as well.20160729_125245.jpg 20160713_114537.jpg 20160713_114308.jpg
 

Yodaweed

Well-Known Member
You need enzymes to stop that, I'd suggest hygrozyme or cannazyme, they prevent and clean root rot.
 

polishpollack

Well-Known Member
I don't know if the algaecide is killing the roots but it is probably designed to kill pretty much anything that live in pool water. I doubt if it's doing your roots any good.
 

JMek420

Member
just now flushed my entire system again.
Ran clean water no nutes for 30 minutes.
Drained and rinsed.
Ran another cycle of ph'd water with a small amount of Pythoff (Chloramine) for 1 hour.
Drain and rinsed.
Now filled with clean ph'd tap water (ppm 140 / ph 5.8 )
I just started to brew a fresh batch of "Tea" in a separate bucket with RO water. (Just great white, 1/2 tsp unsulphured molasses)
I am going to just run plain tap water in the system until tomorrow night, then try adding a tea im brewing at the moment with GreatWhite.
 
Last edited:
Top