nutrient deficiency...but how?

Looks like a nutrient problem to me but how can it be if the plant is in DWC bucket?
Strain - pineapple Chunk from clone
Nutrient- master blend mixed according to instructions ph adjusted to 6 filtered water
Temp set to 77 rh set to 62 for vod of 1.0
LED lighting set to 500 mmol about 21" away

Wow, that's a bummer. I can't offer solutions or help, but will follow along as i am growing in a dwc setup too. almost looks fried/burnt but what do i know. This is my first hydro grow, or any grow in the last 40 years, so I'm a green as a gourd. I'll follow along to learn.

Whats your EC at?.. Been keeping track of the water levels over time as well? Whats the temp of the nutrient solution, and how are the roots looking/smelling? Are you running sterile res with bleach/shock, or a chiller?

Most importantly, How are you measuring PH? Meter, drops? I'd recommended using both to double check. Half the DWC problems I've ever seen were simply caused by an improper ph level, or faulty meter, etc..

mobutu202 said:

Looks like a nutrient problem to me but how can it be if the plant is in DWC bucket?

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Temperature of your nutrient solution might be too high....

Water temperature affects Dissolved Oxygen levels in the nutrient solution, as does barometric pressure (altitude). The warmer the water and higher the altitude, the less oxygen the water can hold under "static" conditions. If you don't have sufficient oxygen in the nutrient solution, plants can't adequately adsorb the nutrients provided, resulting in what looks like nutrient deficiency.

Just my 2 cents. I don't grow DWC, but have read quite a bit about it. Good luck.

i'm running a single bucket so i don't have any way to monitor the water after i do the refill but i'll check the temperature and post back

Drop That Sound said:

Are you running sterile res with bleach/shock, or a chiller?

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i'm running hydroguard. is there a good thread on here on sterile hydro solution? no chiller.

Looks like I'm shopping for a water chiller lol. Every other measurement was fine.

You can use pool shock for a sterile res. Of course I can't remember how much per gal. but something like 1/2 cc or less. Been a few years since I did that, it does ph up you though. Hydroguard didn't work for me so well. At first it was good, but the brown slime still set in.

My dwc 5 gal bucket grow had heat problems as well. I had no solutions other than chiller and if I went that route, might as well go full on dwc with remote res. So hempy pearlite buckets it is

Roy O'Bannon said:

You can use pool shock for a sterile res. Of course I can't remember how much per gal. but something like 1/2 cc or less. Been a few years since I did that, it does ph up you though. Hydroguard didn't work for me so well. At first it was good, but the brown slime still set in.

My dwc 5 gal bucket grow had heat problems as well. I had no solutions other than chiller and if I went that route, might as well go full on dwc with remote res. So hempy pearlite buckets it is

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i found the pool shock thread. i'm going to try and lower the temperature first so i can use the beneficial bacteria but grab some of that sterilizer and keep it on hand if it doesn't work.

Depending on your nutes I would go sterile from the beginning. I use salt fertilizers to avoid the bacteria problems altogether, I hope.

If you are using organic nutes or additives you will have to use hydroguard or some other beneficial bacteria.

I have no experience or understanding with the organic grows other than our lawn and pastures They just get rain, herbicide and horse poop.

On my warm dwc bucket I had to just use pool shock, it did save the plant though, my roots were a slimy mess.
I took everything outside and washed it all with the garden hose, roots and all, I combed through those with my fingers to clean them well.
The roots all came back in nice and white after that and no more slime. This was all during flower of course.

Roots actually look and smell fine. I'm going to adjust a few things and start over

You have a TDS or EC meter yet? With DWC, going full recommended strength on the label with the nutes is usually too rich IME. 1/2 to 3/4 is probably more like it, but you should be testing the solution before change outs, and feeding based on the readings you take and what the plant is asking for.. Once you get the temp\root problems in check anyway...

5 gallon bucket grows with bigger netpots can be tricky, especially when the plant gets bigger and starts drinking way more. With such a low amount of solution, you're more likely to experience rapid swings unless you really stay on top of it doing constant res changes. You would be better off dropping the pot into a bigger container if possible, so you have more than a few gallons. The more solution you have to act as a buffer the better, including keeping the water temp more stable.