2nd DWC grow why does this happen?

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yaboyG

Member
2nd grow DWC D2W what causes this?
One feels pretty crispy, they are sitting around 350-400ppm and temps sit around 68-70 F give or take, I let the ph drift back to 6 around a day or so then drop back down to 5.5/5.8, I really wanna do this type of grow but I feel like I'm missing a important tip, maybe I should just try coco since it's similar and more benefits for my situation (trellis/just water nutes in like soil)

The first time I tried this and it happend, it looks like pythium or root rot but not sure, I have 3% h202 if needed but idk how much to exactly add, I also have added UC roots at 3ml/gal (the buckets holding 3gal). They have weird spotting a discoloration going on, would love to kn9w how to correct this, if I missed anything lmk thanks!
 

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amneziaHaze

amneziaHaze

Well-Known Member
How does the water smell? And what nutes are you using?

Such a small root ph should not run soo fast

Allsoo your ppm could be high how does it change from day to day? Up or down? Those are seedlings they dont need much

What do you use for ph-

You can use trichoderma or h202 but that will kill all life in the bucket.
 
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Fatjoe

Fatjoe

Well-Known Member
Temps in the environment are good but what's the temp of the water? Ya getting any slime on them roots? Them roots should be pearly white. They are having issues eating below so they are eating themselves..lol. I'm guessing them water temps are to high.
 
Y

yaboyG

Member
amneziaHaze said:
How does the water smell? And what nutes are you using?

Such a small root ph should not run soo fast

Allsoo your ppm could be high how does it change from day to day? Up or down? Those are seedlings they dont need much

What do you use for ph-

You can use trichoderma or h202 but that will kill all life in the bucket.
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Water smells I guess what you would kinda expect to smell like there is this weird gunk that ive never seen before, my first time it was just a thin layer of it i guess b7t this time its realy thick it looks like, never seen it before like this, how do i get rid of it?, not too smelly but a hint of "old" water smell kinda, my res temps are saying 66.2F as of 5pm, my ppm for this banana photo is sitting at 350 ppm, I used General Hydroponics flora trio with calmag and used their light feeding chart and even halfed that regiment they recommended at like 1/4 the first week and half the 2nd which is what I'm counting currently up until this Sunday when I change my res again, there seem to only be two problematic ones atm, my banana photo and a og kushx vanilla frosting is acting kinda funky thr same way, dry older crispy leafs, too much light? I got the ppfd for them around 300mol around canopy. I keep ph around 5.5-5.8 do I need to me stricter with ph? I used GH ph down btw.

It could just be a uncalibrated ph pen too I just noticed my battery is getting low.
 

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yaboyG

Member
Fatjoe said:
Temps in the environment are good but what's the temp of the water? Ya getting any slime on them roots? Them roots should be pearly white. They are having issues eating below so they are eating themselves..lol. I'm guessing them water temps are to high.
Click to expand...
My pen says 66.2F on one of the problematic ones, but I heard even with cool res temps you can still get slime/pythium, how would I correct this, I have h202 and uc roots swell as hydrogaurd but I know hydrogaurd is bennies so I'm trying to just keep it sterile.

I also heard gh can stain roots abit but this does look like root rot to me.
 

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D

Delps8

Well-Known Member
65° is getting near the point where you're not getting any P uptake. If you can get water temp to 68°, you can remove that from the equation.

If the air temp is 70°±, that would cause a small plant because the metabolic rate is very low.

It's not a light issue. 300µmol is good for a young seedling and they plants aren't showing signs of light stress.

Step through the graphic that I've attached to rule things out.

I suspect it's a nutrient/water/root zone temp issue.

10 Parameters of Growth.png
 
futurebanjo

futurebanjo

Well-Known Member
It's hard to say but your clay balls look really really dry... I'm wondering if they are getting enough water?
What's your EC and PH?

There are too many ways to measure PPM, so I perfer to just go with EC as a measure of salts/ferts
 
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amneziaHaze

amneziaHaze

Well-Known Member
Its a dwc balls dont go in the water.and slime has nothing to do with ppms.he has light inside the pot or water has unwantdd life in it.root rot stinks its not a nice smell
 
Y

yaboyG

Member
futurebanjo said:
It's hard to say but your clay balls look really really dry... I'm wondering if they are getting enough water?
What's your EC and PH?

There are too many ways to measure PPM, so I perfer to just go with EC as a measure of salts/ferts
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I'll report with a ec later tomorrow, I gave them a nute change on Sunday,, roughly around 2.00/2.50ml/gal at either 1/4th strength or half strength, using cronks 'intermediate' feed chart at like 2-3 weeks in and the same for general hydroponics at week 2-3 for 'light feed, the left side is GH and right is cronk btw.
 
Y

yaboyG

Member
amneziaHaze said:
Its a dwc balls dont go in the water.and slime has nothing to do with ppms.he has light inside the pot or water has unwantdd life in it.root rot stinks its not a nice smell
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That's what I'm thinking, the cardboard is to help with the lid transparency abit but I think I have too big of pebbles, at least till the canopy developes enough to shadow it like how my first run went, after they got their canopy the res seemed fine, barely any root rot after they develop.
 
amneziaHaze

amneziaHaze

Well-Known Member
I usually put cardboard touching the stalk like 2 half circles helps a little.but you have to use bacteria or cemicals like pool shock to control life.
 
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yaboyG

Member
This is the problematic one atm, I gave it 15ml/3 gal like 15 hr ago and it seems to be going better, the ec I keep forgetting to log the ec but I'll say it's around 280-300 actually because since I keep forgetting to account for my taps natural ppm count which is around 175-180ppm, it seems to be doing better after using uc roots.
 

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