diagnosing deficiency

[calibonbon]

Need help ! Things are going great I feel to say I'm on my second crop ever but I'm having trouble when it comes to diagnosing I have a gold leaf that is about a month into flower in a 4x8 with 2 600w has along side a blue cheese each has a 600w to itself I feed them fox farm at half the recommended dose along with call mag . (Gold leaf is the pic of just the leafe) I also have a white widow auto in my veg tent(4x4 1300 viparspectra) that started a twisting deformed thing recently and not sure what either really is any help I can get would be greatly appreciated and I'm looking forward to any knowledge I can get and hope to end up helping others once I've learned more.

[IGH]

Hey good morning.
my eye sees the yellowing centers(tips n stripes) and the "drawstring", also red/purplish stem and petule. I also see brownish discoloration forming in blotchy pattern.
From my experience, tips n stripes and purpling stems n petules, plus drawstring can indicate cal mag defficiency. Seems to be a BIG issue in my coco grow, they can't get enough.
The brownish blotching along with thickened ridged texture of the leaf(speedbumps) indicates overwatering. Speedbumps in my hydro grows are a common issue, but I have found that the blotching occurs when there is not enough O2 in the reservoir.
Last thing, keep in mind when dealing with multiple symptoms.... Check your ph. If your ph is out of range long enough, it can cause all kinds of symptoms. The same goes for root zone issues. Which can also cause flux in ph.

Best checklist I can give you for the info provided and my limited experience. Hope it helps. Good luck!

[calibonbon]

[Campesino]

You didn't mention, but I will follow IGH and assume you are growing in Coco.
It is not likely for Cal deficiencies to show up late in a Coco grow, unless pH is too low.
Sounds like IGH is dealing with unbuffered coco. If it is unbuffered, Coco contains lots of K cations but prefers Cal and Mag cations. Until it satisfies itself, the CEC of Coco will take virtually all the Cal Mag out of the water and replace it with K. You can prevent this by buffering coco in Cal Mag before using it.
In your case, calibonbon it may very well be Cal, but the only explanation for that would be very low pH making it unavailable. If the CEC was taking your CalMag, you would have noticed problems before this.
Are you growing in Coco? What is the pH of your water (inflow)?

[calibonbon]

Hey! Sorry about that I'm growing in happy frog and I've been watering at 6.0 to 6.1 and after this has happen I started hitting it with 5.8 I hope I'm not screwing up even worse and I haven't checked my run off cuz I started watering less in case I was doing too much.

[Campesino]

I think your pH is too low. Notice the range for Cal!
See: http://www.growweedeasy.com/ph

[calibonbon]

Wow thanks man I'm going to try but I must have a positive meter cuz it reads 7 but then again everything I stick the thing in reads 7 or higher smh can you recommend a soil pH tester that is actually accurate?

[Campesino]

you need to measure and adjust the pH of the water that you add to the soil not the soil itself.

[Campesino]

I'd recommend this kit to start

http://a.co/gWUyXsm

[calibonbon]

Pos meter***

[calibonbon]

Or how would you advise correcting it

[Campesino]

Correct low pH by adding water with higher pH

The kit I linked above has an acid to lower (pH Down), an alkaline to raise (pH Up), and a test kit to measure. The test kit uses a color test activated by 2-3 drops of test solution. You can also get a pH meter, they can be had for pretty cheap, but must be maintained.
1: add nutrients to water
2: take sample to test pH
3: add pH Up or Down to adjust water
4: take sample to test pH...

[calibonbon]

I'm sorry I wasn't asking my questions right and to clear it up I'm basically the reason it's low if that is the case because my tap water is around 7 to 8 pH and I always lowered it to about 6 on the dot weather I'm feeding or watering. I was trying to ask if you think I should just start watering higher pH or water enough to get a good runoff and check the pH of that and make adjustments from there? I'm really sorry if I'm being difficult

[Campesino]

No worries, I couldn't really tell where we were at so...
I am now pretty confident in my diagnosis: Cal Def caused by low pH.
Yeah, just water at pH 6.8-7.0. Continue this across consecutive waterings until run-off moves up above 6.3. Then allow pH of the inflow to wander between 6.0 and 7.0 with different waterings. It is better to allow pH to fluctuate like that than to try to consistently hit a target pH.
The damage won't undo itself, but new growth should be fine