Drooping Plant Update 3

[BudBoy2]

Hey all, just got in from the very warm southern Cal. Visiting the kids and grandkids.
Problem i seen is that the leaves on a few are drooping and she is very dark green. I'm using the NukeHeads juice and Hydroton. Could it be that i do need to change the res. As it's been 2weeks on this run. I kept my Cobs 22inches from top of plant and dialed them down a bit to help. Anyone any thoughts? Happy New Year!! .

 

[Planter420]

Looks to be nitrogen toxicity. How many ml per gallon are you using? Are you checking ph? I would suggest a 48 hour flush, plain water adjusted to 6.0 and ease into nutes at 2ml per gallon. Keep the ppm of the res 4-500 at this stage and watch the ph! It appears that the delayed nute change exhausted the effectiveness of the ph buggers and you've locked out all but nitrogen. Flush, mix, test and report! Let me know which thread you'd like to continue with, this one would be fine. Any issues you're welcome to come by and drop pics links or questions and I'll gladly help out. DWC is my niche, but throw a bean in some dirt and I become useless to ya!

 

[Planter420]

Also what is your relitive humidity like? The leaves look soaked, are you foliar feeding or spraying for low rh?

 

[Scientific]

> Looks to be nitrogen toxicity.
The deep green is a sign of "nitrogen abundance" as it says on one of the charts. It doesn't look to me like it has moved into a toxic state (leaf hooking, burnt tips)

>I would suggest a 48 hour flush, plain water adjusted to 6.0
That sounds a little extreme to me. Maybe instead change the reservoir and just lower the N level 25%?

 

[Planter420]

He's using Nuclear Juice which is a single part nutrient, so I don't know if he can do that.

 

[Scientific]

The plant looks well fed, so I'm guessing it could withstand a total reduction of 25%.

 

[ondercuver]

maybe he has hard water and have to use a ton of ph down, I know I have this problem and use a blend of acids to compensate

 

[Planter420]

I would agree with you. Trying to get all these updates under one roof lol I think he mentioned he's at 4ml/gallon and I'm at week three flower and only going with 3ml/gal of the same plus big bud and I've had no issues yet.

 

[Scientific]

maybe he has hard water and have to use a ton of ph down, I know I have this problem and use a blend of acids to compensate

If you have hard water, you should expect to use more acid, but using "a blend of acids" sounds overly complicated and unnecessary to me. I would expect that using enough of any one acid should suffice to neutralize the alkaline components in your water. (Of course, you'd need less of a more powerful acid.)

Polyprotic acids (acids with more than one available hydrogen, e.g. H2SO4, H3PO4) provide buffering (i.e. they can help to stabilize pH), but only one of those acids should be necessary, and plain old pH Down has H3PO4, so I would expect that using just pH Down would do the job just fine.

 

[ondercuver]

but using "a blend of acids" sounds overly complicated and unnecessary to me.

GH ph down is a blend of phosphoric and nitric acid , other mfg of bottled nutes sell phdown for veg -nitric and for bloom -phosphoric.

I think we just had this discussion on another thread, I checked the bottle of GH PHdown just after. (thought it was just phosphoric , but it's a blend)

 

[Scientific]

GH ph down is a blend of phosphoric and nitric acid , other mfg of bottled nutes sell phdown for veg -nitric and for bloom -phosphoric.

I think we just had this discussion on another thread, I checked the bottle of GH PHdown just after. (thought it was just phosphoric , but it's a blend)

We may have discussed this before. pH, pH management, and pH Down come up a lot here, and I do what I can to disabuse people of some of the erroneous folklore that's out there.

When you said you were using "a blend of acids" I got this image of someone mixing up their own custom formulation, which seemed like a lot of unnecessary and even dangerous work.

My bottle of GH pH down says "contains phosphoric acid, citric acid, and monoammonium phosphate" (monoammonium phosphate being phosphoric acid with one of its hydrogens replaced with an ammonia, NH4H2PO4, so I imagine it's working as buffer).

Nerdy good fun.

 

[ondercuver]

seems like the european version is a bit different.

anyway OP should know by now that PH- can be a N source , depending on what he's using.

 

[Planter420]

Nuke Juice is ph perfect and requires no ph buffering

 

[Scientific]

seems like the european version is a bit different.

anyway OP should know by now that PH- can be a N source , depending on what he's using.

I'm running this into the ground, I know, but the OP is in California, so if he's using GH pH Down, it will be nitrate free according to GH.

General Hydroponics – Grow indoor. Grow outdoor. Grow with us.

 

[Planter420]

Lol you guys are silly. He's using Nuclear Juice, which is a single bottle nutrient requiring no ph adjustments whatsoever. Sooooo....... he's not using any type of ph down as there is no need to.

 

[ondercuver]

Lol you guys are silly. He’s using Nuclear Juice, which is a single bottle nutrient requiring no ph adjustments whatsoever. Sooooo....... he’s not using any type of ph down as there is no need to.

Nuclear Juice – MMJ LAB GRADE

you mean this?

 

[Planter420]

Yep, that's the stuff! I'm using it too and it's making my res changes a lot quicker and easier not having to dip into multiple bottles. I haven't checked the ph since I started using it and

My gals happy as a pig in shit!

 

[ondercuver]

I see some purple petioles there

First time I went DWC I used 1 part nutes for dirt from canna (terra I think) , and didn't check the ph because I didn't have a ph meter (and I was armed with a huge set of ignorance+some stupidity) my tapwater ph is 8.5 ish and I also poured some canna rhizotonic that's ph ~9.

Guess they didn't know what I was doing so they didn't mind and grew bush

 

[Planter420]

Thanks I love purple! That's crazy you used nutes for dirt in a DWC and never ph corrected? That's awesome! Did it flower out okay?

 

[ondercuver]

couldn't take them to the finish , many design flaws in the dwc and algae and probably ph went way overboard and last the boys in blue .

I have some freebie seeds I plan to germinate and use just the canna terra in a bucket, will monitor the ph and ec though , just for laughs , I just don't have any spare lamps atm .