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HYDRO RDWC lower leaves dying top growth spotting and dying

H

HatRack

New member
hey so im doing a current culture setup basically little girls are on week two in the buckets. Just noticed this starting the other day and the worst pic is what the little girl looks like today. The most developed plants, up top and at the roots, are showing the worst sings but def noticing some spotting on the smaller ones starting now too. Running lots of air so started with there lowest hyperairated schedual which puts week one at like 80 ppm. Changed water the other day uo to 120ppm now. I strongly feel they are deficient but was advised by current culture to keep ppms there cause plant seems small they said and ensure water level is at second ring of pot. water level has been around there consisantly and no higher than 74,room temps between 70-75 night and day humidity between 40-75 ph between 6-6.3 no more and stead there last two weeks. Please help dont know if i should go against there advice and bump up ppms because the more developed plants showing the worst and this started at the bottom leaves now that i am paying closer attention. Or flush and keep the same ppm. or hand feed the most developed ones for a bit. The one plant went from the best pic to the worst in like two days. Should also mention fairly new still so any help appreciated. Def first grow in RDWC Thanks in advance
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Just a pic of the room under all the insulation and should also mention the one that look the worst are also little pale looking compared to the smaller greener ones.
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Hi Hat, What do the roots look like? What's your pH been? You may have some nute burn? I'd like to see the roots.
 
Try PH down to 5.5....then let it swing back up over a few days. Once it gets to 6.5 adjust back down again.
 
I’d like to see your roots too. What do you use to keep your water bacteria’s free? Don’t you have a “funny” smell of your water? Post some pics of the roots.

and you said your water level is until the second ring of your netpot.... you should have around 2” between the bottom of your netpot an the water. I normally use top fed for the first 2-3 weeks.
 
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i use uc roots and the cultured solutions lineup and was told by them to put the water there. I thought to my self water level lower to make roots search and i have been top feeding one that wasnt growing roots yet into the bucket. I figured the rest of the roots were ok to drink themselves
 
ph ranges from 6 - 6.3 hasnt been below 6 much if any i can check back on hanna but always stays arounf there
 
Whats weird and why i thought more ppms is because the small guys seem to be doing better than the bigger ones and roots all seem about the same development. the bigger ones started showing first and the lower little leaves on them seem to be spotting dying the most quickest. Read somewhere else that to high water flow can cause uptake issues?? And now that i think about it, this did start around the time i switched to this pump from a leaking 800 hydrofarm a couple days ago. Coincidense or no??? Also noticed when i lifted a pot out for pics i had to detangle a root from an air tube which is what im using instead of stones that it had the slightest bit of a slimy feel. Water temps were between 70 -72 when using hydrofarm pump and now seem to be between 72-74.5. Any help appreciated here as im kinda lost.
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I just get rid of one of my seedling yesterday, as I made mistake germinating it too long, the root snapped when I tried to put it in her root riot. She was okay for a while, but the growth was far behind. It was an auto so I decided to get rid of it.

I still think that you have some kind of root rot, or at least your roots are not feeling okay.
I took a picture of my one. The seed was germinated on the 9th. I use silver bullet to keep my water clean, and I use katana roots for the first 2-3 weeks.

Im not an expert, but I don’t think you can go very wrong by giving them some more nutes. Make sure you’re checking on them more frequently.
 

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Nice setup, Hat. And you're absolutely sure there are no light leaks, right? That will mess your roots right up. That and/or too high water temp will cause slime. The cooler the res water, the more oxygen to the roots.

I wonder a bit about your method of getting oxygen to the roots? Just a tube emitting bubbles?

I would lower nutes and lower water, but first I'd flush them with plain pH'd water for 24 hours. Root growth definitely needs to pick up. And use Hydroguard to protect roots.

For the first few weeks once I've put a very diluted nute solution in the reservoir, I lift the res lid and I spray the bottoms of the pots with the res water. I have a big syringe I use for that.
 
Sweet rig

Any idea of what the water temp is, after it's all closed up?

You need some beneficial bacteria in your root zone. Looking at their site, UC Root is an all purpose cleaner.

Bacteria loves our reservoirs, so we need to populate with a better class of bacteria. Root protection
Botanicare Hydrogaurd is a common choice. I cant get it here, so I use General Hydroponics SubCulture B

As Atu says - flush your res, plain water (maybe a dose of that UC clean).
Beneficial bacteria with your nutes

What is your 'plain' water - you should also look into a CalMag supplement. (I use RO, so I have to add calmag, to make it 'plain' water)
 
No im not positive on light leaks hence all the foil lol. I made the mistake of getting white buckets thinking the white was not trnsparent but it is so i made jackets and then went as far to wrap everything again so im pretty sure there is no light getting in but not 100%. And ya water temp has been around 74.5 due to this new pump was always 72 and under before new pump which is also when this all seems to have started. Higher water temp more flow now and also have been turning lights up every couple days. There is an air tube in each bucket and one in each rez also. So you guys run that hydro guard in addition to your nute line up. And what do ya guys use for nutes, run for water temps and airate the system. Any one using cultured solutions. Have always heard not to use beneficial bacterias in these systems i thought?? And cal mag is part of my line up. So update there is no light getting into the buckets.
 
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For nutrients i'm running General Hydroponics products. Flora Trio (Micro, Gro and Bloom), Armor Si, CaliMagic and SubCulture B

I was running into root issues, until I started the bacteria.

Straight DWC
 
Is it really bare tubes, sticking into the reservoirs (for air bubbles)?

You may want to look into airstones down the road, breaks the air into tinier bubbles that the roots benefit from
 
Either way will add oxygen to the water. Smaller bubbles are preferable because they maximize the surface area the oxygen touches in the water. But larger bubbles will still oxygenate the liquid.
 
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