Help with diagnosis please

[richyrich]

Just watered one of them through with rain water ph 7.4, runoff collected ph 6.78 ec 2.8

So, would that suggest it's not a lock out?

That is the one thing of this great hobby. There seems to be a whole lot of detective work with it. There is always a lot of ruling out to do to resolve a problem.

My last suggestions I was under the impression you were using RO water. My mistake I misread. Now you took this reading with rain water. It is in range, good. But have you been using the tap water as you posted in your initial post this whole time. That is what you need to use to get an accurate reading so you can figure out what has been happening this whole time. You have changed one of your constants to take this reading. It can throw off the whole process of elimination. Get an accurate run off reading with the tap water you have been using this whole time. If that is in range then suspect your tap water next which you said is hard. Give us an EC reading on that by itself. If it looks bad you may have to go RO water. If it seems ok then I would suspect a possible overfert. But again, I am familiar with the Bio Canna nutes and find them a little harder to burn with.

 

[richyrich]

Just watered one of them through with rain water ph 7.4, runoff collected ph 6.78 ec 2.8

So, would that suggest it's not a lock out?

Replying to your EC on this I think it is high. That is 1,400ppm on a .5 conversion. I feel that is quite high for just starting the bottle feed from the soil. Need to start them off a little lower and then bring it up while reading the plants needs, IMO. Get those readings from my previous post and if all good suspect this.

 

[Stan Laurel]

Thanks again guys

Thinking about it now, I see why I should have tested with tap water, but as it may be to blame I thought using rainwater preferable. ph of the 2 is similar, but obviously the rainwater ec is minimal.

I had considered this problem to be overfert, but as it first happened before any feeds were give, after 3 weeks in fertile soil I couldn't see how it could be over fert?

Now, I know without checking that the ec of my tap water is around.6, so I'm guessing if I take readings using this the ec is going to be skyhigh?

Going to have to wait until this evening, but I have a bucket of tap water standing now, so will try again tonight when the lights come on.

Thanks again for the input guys

 

[Stan Laurel]

I'm wondering if this is something to consider as I'm using the Plagron Batmix?

When you have too much Potassium in your soil, it can lead to big troubles, like salt damage and acid fixation of the root system, as well as too much potassium can cause a calcium deficiency. Your fan leaves will show like a light to a dark yellow to whitish color in between the veins. Due to a molecular imbalance, potassium toxicity can cause a reduced uptake and lead to the deficiencies of Mg, and in some cases, Ca. Also leads to the other nutrients to not be absorbed properly leading to lots of other deficiency such as: magnesium, manganese, zinc and iron and can cause problems with calcium as well.

I'll run the ph & ec checks on the runoff from tap water tonight, but as the ph of my stood tap water is higher than that of the rain water I can't see there being a problem?

Maybe it is excessive K playing havoc with the Ca uptake?

 

[Stan Laurel]

OK, watered with tap water last night. Started with a ph 7.55 ec .6, runoff was measured @ ph 7.2 ec 3.2

So there's no lock out?

Seems the soil is very hot? and additional feedings are not required until that ec drops?

 

[Core]

overfeeding the girls are't ya.....3.2 ec is 1600 ppm's....in soil you don't go over 1000 ppm's ....

 

[Stan Laurel]

overfeeding the girls are't ya.....3.2 ec is 1600 ppm's....in soil you don't go over 1000 ppm's ....

Thanks for the input Core, but if you read the whole story you'd see that this started well before feeding began!

I won't be adding any additional feed obviously, but I'm puzzled as to how this build up has occurred?

They've had just two feeds, both a week apart with Bioflores @ nowhere near full strenght?

 

[Core]

i woz following the thread actually...i stated this coz i know bat mix has a ec between 1.4 and 1.6...so if your soil is ec 3.+ now with only a few feedings .....you must have put to much in it logical wise......some things must have gone wrong somewhere??.....maybe bioflores just is't good to use in batmix...?

 

[Stan Laurel]

Don't get me wrong, I'm not shooting you down!
It's puzzling the shit out of me, but the theory that continual feeds with tap water has caused the ec to rise is beginning to sound about right.
See, I fed @ around 3ml/litre which shouldn't be a problem from past experience.


I'll see how they look in a few days after this last watering.

 

[richyrich]

Early on if your ph was the same at 7.2 I would say that right there could be your problem since it was happening early on. And now the problem could be compounded by overfert which will cause lockout which causes deficiencies. Flush all the bottle ferts out and adjust your tap ph to get your runoff in the 6.4 to 6.8 range. Another thing is I dont like your tap water. It is on the hard side. IMO, I would be using a RO filter.

 

[Stan Laurel]

Bump for the benefit of Stitch.

 

[Guest]

It does look like burn.

 

[Maj.PotHead]

high Stan long time no see hope ya get your problem figured out dose look like ca - mag problem, my tap water run 7.2-3ish out of the tap. i allow to sit min 8 hrs before use so i dont smell cloriene i will adjust my waters PH to 6.5 before use. i feed every other watering if its feeding time for the plants i add any liquid ferts to be used. now i adjust my waters ph to 6.5 if its a plain water feedn i just adjust waters PH 6.5 alot of good soils come PH ballanced 5.5 - 6.5 type FFOF dose. if you water with to high PH your soils PH will drop through the floor and problems occure, ive experinced the same problems and have had the same effects your having now. if your half way or more then half way i would just continue along buds seem to be producing nicely yes or no ??. next run use same water source and adjust the waters PH before feeding plants i use these ferts in fox farm ocean forrest soil
liquid karma 10ml per gal water small plants mid-large plants 20ml
diamond necture 10ml per gal water small plants mid-large plants 20ml
sweet 10ml per gal water small plants mid-large plants 20ml
pure blend pro grow 1 tsp per gal water
seaweed extract 1 tsp per gal water this ferts feeding gose on from 2nd watering in soil into 3 wks of 12/12. i drop the PBP grow seaweed extract keep the rest and add
just got pure blend pro bloom 1 tsp per gal water
use like smoke lol indoneasion guano 1 tsp per gal soil every watering after 30 days flower

on a side note if your using a drain catch pan for your containers drainage extract whats drained after 10 min's. again ive experinced the same problem your having now by not extracting the drainage water. also 1 time in had bad fox farm tiger bloom made my 2nd or 3rd crop do what your experincing. maybe listen to your liquid ferts when shaking, if somethings ratteling around inside ferts may be bad

 

[Stan Laurel]

Major, good to see you again bud Although a shame it's in the infirmary mate.

I'm pretty sure that it is indeed my tap water that has been causing this. You seem to have read the situation pretty well from what you've posted. See, as mentioned the problem first became evident after 3 weeks of nothing but plain water. Considering that the last grow I was able to use collected rain water, and had no such worries just seems to make it that much more obvious!
As you say, we're almost 1/2 way thgrough flowering, and the problem doesn't seem to be getting any worse. So, hopefully it'll have little effect on the outcome other than spoiling the look of some fine looking specimens.

They'll be due a watering in a day or two, so I'm planning to use rainwater again, taking readings from the run-off again in the hope the e.c has dropped back again. I'll then start to feed again keeping a close eye on things again. This whole affair has become so confusing as once nutes are added the ph seems to be more acceptable, but obviously with the fertile soil it needs to be dialled in a little better.

Grow and learn again

 

[Maj.PotHead]

no shame in meetn up again in here bro all great gardeners have problems every now n then wonderful this section of the forum is here. check out my current grow HomeGrowen link is in my sig i've been 1 busy BEE lol