Indoor What are my babies complaining about?

[MangoTango]

Hi there, first thread post on this forum (glad to be a part of the community).

I'm currently doing an auto northern lights grow and some of my babies leaves are showing signs of distress. I will give a breakdown of my grow environment, what I'm feeding them,..etc and I'll throw a couple photos in. Hopefully we can get to the root of the matter!

Grow Environment:
-Plants are at day 33
-1200 watt mars II LED grow light
-Inline fan
-Grow tent
-1 Small fan blowing over canopy
-Advanced Nutrients Jungle Juice A/B (plus big bud, b-52, voo doo juice)
-tap water that has been left open for 2 days
-Large pots with soiless potting mix (perlite, coco...etc)
-Temperature is stable around 23-26 degrees Celsius

Earlier in the grow I was trying TaNgs auto schedule out with jungle juice instead of sensi grow/bloom and I burnt the tips of the plants a little so I have backed off significantly on the concentration of feed that I'm giving them and have given them a light flush.

However new growth leaves continue to twist slightly on 4/5 plants (see pictures below, the last photo gives the clearest example) any idea what this might be from? Is it just residual effect from nutrient over load? I'm lacking pH testing equipment, could it be that the pH is off? Everything else on the plant seems normal. All feedback is welcomed!

 

[The Elvis]

Hi and welcome .. can you get us pics out of the led light? I cant see anything..

 

[blue]

Hi MangoTango! I like your name! It's fun to say!

Welcome to AFN!

It's a little difficult to see the leaves under the LED light, but everything looks in check equipment wise, and most of the leaves are looking pretty good from what i can see.

I'd put the money in pocket on the PH being out if you don't have testing equipment. If you have nice coco like canna coco pro plus - it's buffers are pretty good, but you still need to PH between the ranges of 5.6 to 6.2 (i'd go for 5.8 and run some through if you can get hold of a digital meter)

The rest sounds and looks good.

 

[Dazed]

I agree with Blue! pH out of range can cause new twisted growth, I always start with pH myself.

Looking really good though, sometimes letting them dry out a bit swings the pH back up, but I can see your following TaNgs feeding schedule so maybe that isn't an option for you?

and :styles rasta:

 

[namvet25]

From what I can see with your lights on is the starting of your terminal buds and you are seeing a lot of very thin twisted growth that is normal for the early stages of bud development.

 

[MangoTango]

thanks for the fast reply guys! here are pics under cfl lighting. sorry for the crappy quality, just a camera phone. if needed i can try and take nicer ones.

 

[MangoTango]

i had no idea that the start of flowering promoted the tendency for young growth to twist (im going to play the new grower card here). lets hope that is all it is!

 

[MangoTango]

would anyone have a recommendation for a method or instrument for measuring pH accurately?

 

[blue]

These are all good.

I've had an essentails for about 5 years now - I Check it and calibrate it after every grow and it has always been reliable and never wildly out. I dont use any storage method other than wiping and keeping it clean

The blue labs are more expensive - espeically the truncheon, but regarded as top quality equipment

 

[MangoTango]

oh so i should focus on liquid pH readings more so than soil? i just pH test the water before and after i add nutrients, make sure things are in line?