Root rot - help me save my plants!

[Mindovermatter]

I still don't know how the plants are being grown. You said they are in a bubbler. So, the roots are supported by the rockwool and coco. But the whole thing is submerged? Both rockwool and coco?

There are 4 plants. They are in 1L (1/4 gallon) plastic cups which I have cut open about 50%. The top mediuim is rockwool, the bottom is coco. The pots were submerged about 1 inch into the bubbler which I started 2 days ago, but I raised them according to the root rot theory. BOTH rockwool and coco yes. The coco is GHE brand. Few roots in the coco, lots in the rockwool. White colored mostly.

 

[Mindovermatter]

Ok so the mix of chlorine and h202 has been in the bucket a good hour now. is it enuff?

 

[sproutco]

Submerged only an inch into the bubbler? So you can let the coco and rockwool get drier? Looks like lack of oxygen is the bigger problem. The roots don't want to go deeper. They are going crazy on top. Are you going to increase the nutes? That needs to be done as well. You said your ph initially was 7.4 with 100 ppm's. I bet that is all calcium. This combined with what is in your nutes could be alot. This could be bonding with your phosphorus and making it unavailable if the ph gets off. Shoot for about 6.

Chlorine should not sit on plastic longer than 15 minutes. It will go into it and then gradually leak back out later. 10 minutes contact time is plenty.

 

[Mindovermatter]

damn!!!!!!!!!
what should I do then I let them sit an hour? rinse rinse??
The bucket is labeled "food grade" which means its pretty healthy?

 

[sproutco]

Rinse it really well. That tip about not letting the chlorine sit on plastic long came from this kick ass book:

Holland Bulb Forcer's Guide
Edition: 5th
Author(s): Hertogh, August De
ISBN: 909008455X
Format: Hardcover
Pub. Date: 3/1/1996
Publisher(s): Ball Pub

 

[Mindovermatter]

arrrghhh I am so mad now I could kill someone!

I put everything the bath tub and run the shower...gonna let it run for a while ...

 

[Mindovermatter]

the plastic tubing of the air pump has an area which is visibly discolored yellow, I guess its from the chlorine? argh $€$$€£@$€ f***** great!

 

[sproutco]

In the future, it might be better to use just hydrogen peroxide and no chlorine and you want have to worry about rinsing residue as much.

 

[sproutco]

Submerged only an inch into the bubbler? So you can let the coco and rockwool get drier?

???

 

[Mindovermatter]

Sproutco:
They were submerged one inch, that is the coco bottom part that was submerged. But now they havent been submerged. You told me they wick water right, so how can they get dried if they are submerged?

 

[sproutco]

>increase oxygen to the water maybe with another airstone because of roots not wanting to go deeper

>add hydrogen peroxide daily to the water to control pathogens

>increase nutes to 400 ppm's or so

>keep ph at 6

See what happens. Doesn't that sound like a good plan?

 

[-VT-]

This Post from Stitch says it all....can't add much to what he said here

I grow in DWC and I have a coco mix as my medium....

I use a netpot though....and I line the bottom with Lava rock (you could use several different things)

You need to lower the water level....as previously posted by the lorax and myself...and others on the other thread

I read the entire thread where I got the post from Stitch....it doesn't look like root rot to me....I think you (well, your plants ) suffer(ed) from low DO

good luck

 

[Mindovermatter]

OK I did as you said lets see what happens...
PH 6, ppm 400, 5ml of 17,5% h202 in 2 gallons...
plants are above the water...

 

[NoveegianGod]

Just add my two cents,

1. H2O2 is a biocide, yes it will eat the dead roots first. It will also have an effect on your good roots as well as killing any and all benificial bacteria that supports your root system. Only use H202 to try and fight heavy root rot that is clearly killing your plants meaning the whole root system getting brown and slimy.

2. 70deg rez temps are good but when you are having a problem 65 is even better. Even 60 won't hurt your plants though it may slow their growth a little (not sure about that) but 60-65 will wreak havok on pythium. So try and get your rez temps even lower than they are.

3. I highly recommend hydroguard, if you get your plants stable it will keep them stable even if something else goes wrong.

good luck

Grow strong, grow safe,
Nov

 

[Mindovermatter]

Alright thanks everyone for the help and input you provided through these 3 hectic days.

Noweeigan: OK 1 bottle of 16 oz ice added to the res...will report res temp in a few...

 

[Mindovermatter]

Ok as promised, here are the pics of the one I killed a few hours ago. As you can see the roots look healthy? While the roots here from the RW seem good, I thought some in the coco looked yellowed, and I even saw some fluffy stuff when I snipped the brown roots earlier (but maybe these are the fine roots that is good?) Or maybe it was the coco that had colored them? Anyway I'll post an update tomorrow on the progress of how it's going.

 

[sproutco]

Looks like a gob of good lookin' roots and you killed the plant. Don't do something so hasty like that again. It only may have had just a few bad roots. I pray for the rest to come through with their new living conditions we gave them today.

 

[Mindovermatter]

Ok so I dont have root rot either? Its just oxygen defiency? Can it be true they have normal roots in the RW but rotten in the coco further down?

Some of the leafs ends have turned dark black...what does it mean?

 

[Mindovermatter]

Can someone tell me if its normal for a plant to have a crust on the main stem? Is it a symptom of pythium? I dont know how to describe except...crust..?

 

[Guest]

bro, you should be indicted for M-1..murder..lol... those roots look fine enough to me.. I dont understand why it was killed..there is an obvious nitrogen hunger problem, though..

as per the tips of the leafs and the black.. can you share a pic, plz? same with the crust on the stems