Wilt to Sudden death

[dab7wr2]

I am in DWC with plenty of air in the buckets, 4th week of flower, 1000W HPS, using GH nutes, PH stable at 5.4-5.7, nutes ranging from 600-700ppm, temp is 75-84 day, RH = 49-56%.

Two days ago I notice the water level has not gone down like the other buckets which eat about a 1/4 gal per day and checked to make sure all the nutes and PH was correct. Everything checked out fine. Today all the leaves are drooping to an extreme measure as if the plant has stopped all water/nute takeup. the roots have been in water that has mass air supplied. I first soaked the root ball in a solution of H2O2 and water to see if I could not get some troubles corrected before I got a new solution. I changed the buckets water and nutes to 550 ppm and 5.5 ph and see no change after 8 hrs. roots are health and white/yellow.

I will also mention I have never seen this before and I had a larger 4 footer do the same thing in veg about a month ago and the crop just dies off after 5 days for no apparent reason. I am expierenced with DWC so I am stunned at the problem.

The pictures show a 4 footer on the left that in 48 hours went from a vigorous plant to looking like death. the crop to the right is exactly the same setup and is looking spectacular. nutes around 650ppm and all loving it except this crop.

Need some advice quick before she is gone :wtf:!!! Thanks

dab7wr2 Reviewed by dab7wr2 on 08-27-2008. Wilt to Sudden death I am in DWC with plenty of air in the buckets, 4th week of flower, 1000W HPS, using GH nutes, PH stable at 5.4-5.7, nutes ranging from 600-700ppm, temp is 75-84 day, RH = 49-56%. Two days ago I notice the water level has not gone down like the other buckets which eat about a 1/4 gal per day and checked to make sure all the nutes and PH was correct. Everything checked out fine. Today all the leaves are drooping to an extreme measure as if the plant has stopped all water/nute takeup. the Rating: 5

[veggii]

Hi, dab7wr2
please fill out this trouble shooting form so cummunity can assist you proper ty.
http://boards.cannabis.com/plant-pro...anted-one.html

[dab7wr2]

H=Answer if you grow hydro or aero
Hydro
T=Answer if you grow in HydroTon
Hydroton

E= EVERYONE needs to answer lol!


E-indoor
E-hydroponic
E-Hydroton
HCL-Hydro/aero/soilless system type
DWC bubble buckets
E-Water source - RO

E-Source water pH - 6.7

HRT-Source water EC (if hydro) - 2 ppm

E-Age of plant - 87 days total, 27 days in 12/12 flower

E-Type of fertilizer - GH 3-part micro, gro, bloom

E-Rate of application (if hydro, this is your PPM number, preferably after each component is added)
600-700 PPM
E-Lighting source and distance from plant - 1000w HPS, 24 inch above

E-Air temperature - night - 68-72 F, day 75-85 F

HD-Reservoir temperature - 75 F

E-Air % Relative humidity - night - 40-45%, day - 50-55%

E-Lighting schedule - 12/12

E-Type of ventilation your room has - 6 inch ducting for the HPS to outside, dehumidifier, multiple fans

TR-Did you pre-soak your media in pH corrected solution? - yes, washed hydroton in the beginning 4 months ago

[veggii]

dab I'm not a hydro guy i am a noobi soil learner..LoL but I didn't see in your form any CO2 or fresh air intake? do you have any of that? give it a little time, the hydro pro's will show up too help you ....:jointsmile:

[dab7wr2]

ya I have fresh air coming in on both sides of the room and run CO2 off a tank with a regulator. My lights are vented from outside air then go back outside on the other side. This is not a first grow in the room, there are other plants that are just fine and vigorous all around this one. This randomly happend to one in veg like a month ago and I have never seen this problem in 3 years. It is almost like the roots completly stopped uptaking anything, like a clone where it only absorbs moisture into the leaves from the high humidity because of no root system, yet it has a root ball the size of a basketball that is very health looking. I also soaked in H2O2 to try and help rid anything bad on the roots.

[veggii]

dab aww man none of them guys came too help you out. not too worry stinkyattic will be online in the morning she'll help you,shes a genuis walking/talking/typing cannabis encyclopedia/wiki/nobel prize winner(oneday).
so get online in the morning cya:thumbsup:

[Weedhound]

Your ph needs to remain between 5.6-6.2 at all times. 6.7 is a fair amount too high and even if it's been that way the whole time change it to 5.6-62 and watch it constantly.

How often are you changing your solutions?

Your water temp should be closer 65-70 degrees to prevent root rot.

Also be sure you have enough areation in your water and nute solutions also for root health.

Root rot could well be your problem here. Are you using anything for root health such as a zyme product?

So could the fact that you are not using any CalMag according to your troubleshooting form but ARE using RO water so you could have some pretty good calcium, magnesium, iron or or mineral deficiencies as well or.........even just general UNDERfert....600-700 is pretty close to nothing in flower even if you are using a 500 conversion from EC. Most people are up to LEAST 1200 or more by that time.


Got SEVERAL issues going on and the problem could be any of them or a combination of all three so I'd fix all of them asap.

good luck.

[dab7wr2]

CORRECTION: the PH of my solution in res is 5.5, my RO water is at 6.7... sorry for the confusion.

change solution every 2-3 weeks. They eat about 2 gallons every 4 days so i replenish with a 3/4 solution.

I run the heavy duty commericial air pumps so areation is no problem.

I have other buckets running the same nutrient solution and are the same size with no current problems. all of which are at 600-750ppm.

roots are in healthy condition, trust me I have seen some bad root rot before.

[stinkyattic]

That's a big plant [read:big root mass] for standard-sized DWC. Root rot is most likely your culprit; you can do a couple things to try and save your plant, and the rest of the crop:

-Raise the lights, or better, switch to flouros right away to reduce water loss, and personally I'd turn off the CO2 tank. You want to slow them down a little because fast metabolism means fast water loss, which you can't afford with nonfunctional roots.

-Next, see if you can't manually insert some more air stones INTO the center of the root ball- the areas with least access to oxygen harbor the most potential for rot to form in those nasty anaerobic conditions.

-Run a 'zyme product to remove all dead material from the reservoir, following instructions PERFECTLY and changing the res a couple times because it will release a lot of useable nutes into solution- which you actually DON'T want, since it's at an unknown level/ratio.

-Explore your options for a larger reservoir. High biomass and low volume mean that chemistry is VERY difficult to control and you will have all manner of troubles.

Weedhound, can you link to where you went through your root problem before you switched to livestock feed tub DWC? I think there's enough material for a DWC root rot sticky in there, because the process and solution are really well documented!
(I'm sending good vibes your way too! )

EDIT: WH is right about pH and CalMAg too.

[Weedhound]

How about a photo of your roots......all trust aside. Good that you have some stuff going well but lack of Cal Mag is a biggie.....and tells me that there are some gaps in your knowledge so trust isn't really the issue here.....knowledge is.

They're your plants.....I have no time or energy to argue abo ut things. You asked for assistance and I offered what I know....that's all you'll get from me and if you're darn sure you know whats right and whats not I'll leave you to it.

Sorry to sound like such a bitch but I've just received a bit of pretty bad news so my remaining time is literally limited.....and I have no intention spending what energy I have left defending or justifying my knowledge or suggestions to folks who ASKED for information only to discount it. Again....I KNOW how bitchy this sounds and I am sorry for that.......but I just don't have the time to waste convincing people of things these days.

Best of luck to you and I really do mean that.