Nute Deficenticy or what?

[Asil]

How long has this problem been going on?a week
Are you growing in a PVC grow tent? no
What system are you running? RDWC
What STRAIN are you growing?Bagseed
What was the establishing technique? seed
What is the age of your plants?3.5 Weeks
How long have they been in there mixture they are in now? Since Sprout
How tall are the plants?9"
What PHASE are the plants in? vegetative
What Technique are you using?
What substrate/medium are you using?Hydroton, RockWool
What is the Water temperature?70F
What color are your roots? White-Tan
What Nutrient's are you using?GH Micro, Bloom
How much of each nutrient are you using with how much water? 50% 0-8-16 for twenty gallons of water
What order are you mixing your nutrients? Micro Recirc, Bloom Recirc, PH
What is the TDS/EC/PPM you are using?
What is the pH of the "Tank"? 5.8
Are you sure your calibration is correct on your equiptment? Yes
What is your water temps?70F
When was your last feeding change? 5 Days ago 50% lucas
How often do you clean your system: example: Every two weeks
What size bulb are you using?400w MH
What is the distance to the canopy?30"
What is your RH Factor(Relative Humidity)?55%
What is the canopy temperature?76.6F
What is the Day/Night Temp? 72-80
What is the current Air Flow? 473 cfm
Tell us about your ventilation, intake exhaust and when its running and not running ? Always on
Is the fan blowing directly at plants?yes
What water are you using? Reverse Osmosis
are you using water from a water softener? No
Has plant been recently pruned, cloned off of or pinched? NO
Have an y pest chemicals been used? If so, What and When?AZAmaz one week ago sprayed
Are plant's infected with pest's? Not that I can tell with a inspection of leaves with a 30x loop





Ok leaf tips are curling under. ALso some of margins. Spotted leafs. Plants have light green on margin around leaf. Greener in center. Couple of plant's look twisted and deformed. I have them sitting in a fresh phed RO water. Waiting to deciede what to do. Do I increace to 100% Lucas? I am at a loss here. I have been reading and reading for about a week, and just when I think it is one thing then I think it is something else. Any advice or opinion welcome. Just trying to learn to read my plants.

 

[REDEYE_420]

See whether you think it might be this-Leaf Spot Fungus?

Peace.

 

[Asil]

a couple of the lower fan leaves look like that. I am more concerned about the curling and the distorting of the new and old growth. Also some of the leaves around the margins are getinng a light yellow, this is including the new growth.

 

[Bababooey]

I would say you need a res change but then you're using RO water (theoretically no mineral buildup from RO water). You have them sitting in fresh RO water, are they recovering? If not, maybe it's that leaf fungus; maybe try a foliar fungicide spray. Go to home depot or walmart or a garden store and try to find a fungicide spray that's safe to use on vegetables (odds are if its ok to use on edibles, it'll be ok to use on smokables).

 

[Hydro-Soil]

What Nutrient's are you using?GH Micro, Bloom
How much of each nutrient are you using with how much water? 50% 0-8-16 for twenty gallons of water
What size bulb are you using?400w MH

Do I increace to 100% Lucas? I am at a loss here. I have been reading and reading for about a week, and just when I think it is one thing then I think it is something else. Any advice or opinion welcome. Just trying to learn to read my plants.

Yes. Increase to 100% Lucas and all that will go away.
Your light levels are intense enough and you're using RO water. You'll be fine.

Just remember to up the pH to about 6.0-6.1 around day 20-30 of 12/12, depending on the strain. The plant uses a lot of Mag during the bud-set phase at the end of the stretch and you'll want to keep it elevated throughout that period.

For the rest of the flowering, go ahead and drop it back down to whatever the plants wanted before that point.

 

[Asil]

Well I don't know what the spots on the lower leafs are from, The spot leaf fungus , blight I don't know. But it doesn't seem to be spreading and if it does I just clip those lower fans off. I raised up to the full lucas formula. Ph is running a steady 6.0 and temps are 72ish. We will see what a day brings. While looking at my plants today, I noticed that they are branching out everywhere and they are staying nice and compact. The tallest plant was 9" this morning. I thank you all for you help now time will tell, but I think they where just telling me "Hey, dumb ass, You think we can grow like this with that 50% strength crap!!! Give me some more food!!!!" LOL

 

[10k]

Somewhere on icmag is a horrible hydro pH chart which has people running about the absolute worst starting chem hydro pH anyone could advise being 5.8 start. Arrrrgh this is SO DAMN WRONG it's pathetic.

5.8 initial pH in chem hydro is horrible !
A 5.8 start pH in a true chem hydro grow, especially when running gh flora chem nutes is the exact point of the lowest mag availability, drifting upwards above 6.0 and you start to see several elements becoming much less available, get past 6.3 and P goes badly def too.

Get your pH running in the range of 5.1 to 5.9, going with a starting pH of 5.2 and letting it drift gradually upwards through this range and you'll stop seeing this mag and slight P def showing in your pictures.

ps...your rw in your net cups is staying too damn wet in your hybrid dwc system...
I would lower the water level just below the net cups in the tubs if it isnt already, and move those recirc tubes away from the rockwool in the netcups so its not directed onto the rw any more, but rather just below the rw in the cups.

 

[Asil]

Hey 10k, thanks for stopping by. My water level is 1" below my netcups and there is hydroton under the rw in the net cups so there probally is a 2" gap in between the Rw and water. Also the feeder lines just recirc the water from the res. It flows straight down from the top in to the buckets never hitting the netcups or Rw. I think my rw is pretty dry, I haven't checked the bottom of it but I would wager it is.

So you think my ph is to high? I thought running between 5.8 and 6.2 is right where you wanted to be. Except during days 20-30 in flower where you let it drift up to like 6.0-6.2, for this is when the plant needs more access to mag? I do see the P def showing in some of those photos. It was my understanding that below 5.5 things really start getting locked out.

 

[Hydro-Soil]

Get your pH running in the range of 5.1 to 5.9, going with a starting pH of 5.2 and letting it drift gradually upwards through this range and you'll stop seeing this mag and slight P def showing in your pictures.

So you think my ph is to high? I thought running between 5.8 and 6.2 is right where you wanted to be. Except during days 20-30 in flower where you let it drift up to like 6.0-6.2, for this is when the plant needs more access to mag? I do see the P def showing in some of those photos. It was my understanding that below 5.5 things really start getting locked out.

Listen to 10K here, they know what they're talking about. This is the "Adjust the pH back to whatever your plants were happiest at" part of my advice.

Edit: Thanks 10K as another piece just clicked in my head from that post. I'll have to edit my sig soon.

 

[Asil]

Okay I know when to listen. I will take it down to 5.2 and let it drift up to 5.9. But once I set my res it does stay pretty stable. At least when I set it to 5.8 it did. I will go do that now! Thanks again!

 

[10k]

Oh hey asil, don't dismiss the folks who said go stronger mix, because they're right too.
Those plants are hungry for sure, now that you've explained that the rw isn't being continuously soaked it explains the overwatered look
...with the exclaimation "feed us more"