Help! Is this potassium deficiency?

Thread starter #1

hird

New Member
Heeeelp!

I think I got potassium deficiency!



I watered today with water mixed with BioGrow and Bio heaven 1ml each litre of water the PH was 6.5 and 300 ppm, my tap water is about 60 ppm.

The run off tested at PH 6.4 and 360 ppm.

And I noticed this!





This picture was taken 2 october


Last 3 times I watered

4 October
Water had a PH of 6,4 and 520 ppm
Runoff had a PH of 6,4 and 570 ppm

6 October
Water had a PH of 6,6 and 61ppm
Runoff had a PH of 6,5 and 140 ppm

8 October
Water had a PH of 6,5 and 300 ppm
Runoff had a PH of 6,4 and 360 ppm
 

Antics

420 Member
The more information you can give, the more it can help us figure it out!

Looks like Phosphorous and Potassium to me.

http://www.420magazine.com/forums/frequently-asked-questions/83620-how-ask-grow-support.html

REQUIRED INFORMATION FOR GROW SUPPORT

What Strain is it?
Is it Indica, Sativa or Hybrid? What percentages?
How Many Plants?
Is it in Vegetative or Flowering Stage?
If in Vegetative Stage... How Long?
If in Flowering Stage... How Long?
Indoor or Outdoor?
Soil or Hydro?
If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?
If Soil... What is in your Mix?
If Soil... What Size Pot?
Size (Wattage) of Light? How Many?
Is it Air Cooled?
Temperature of Room/Cabinet?
RH of Room/Cabinet?
PH of Medium or Reservoir?
Any Pests?
How Often are you Watering?
Type and Strength of Fertilizers used?
Size or Square Footage of Room?

This information is necessary for accurate support to be given.
 
Thread starter #4

hird

New Member
What Strain is it? Supposed to be OG kush, but I live in a country where its illegal, so im not 100% sure.
Is it Indica, Sativa or Hybrid? What percentages?
How Many Plants? 1, but there is 3 in the tent
If in Vegetative Stage... How Long? 4-5 weeks
If in Flowering Stage... How Long?
Indoor or Outdoor? In a 2x2 SJ tent
Soil or Hydro? Soil mixed with perlite
If Soil... What is in your Mix? Perlite and soil
If Soil... What Size Pot? 9-10 inches wide, standard flower pots.
Size (Wattage) of Light? How Many? 1 x 250 CFL at 2700k and 2 x 45w at 4000k
Temperature of Room/Cabinet? About 22 celcius at night and up to 30 at day time.
RH of Room/Cabinet? 30-40
PH of Medium or Reservoir? 6,4, I use liquid tester so its not 100% accurate.
Any Pests? Had some spider mites, been treating it with spider mite control
How Often are you Watering? Its needed about every other day.
Type and Strength of Fertilizers used? BioBizz BioGrow NPK 4-3-6 and BioHeaven
Size or Square Footage of Room? 2x2 the hight is 67 inches.

I will try to get a picture after work.

Im pretty sure it as Antics says Phosphorous and Potassium.
But if it is, should I just blend the nutrients stronger and give it a proper watering when its dry again or should I do it now?
 

Tead

Well-Known Member
Wow... I'm sorry... you were speaking of potas.... I was confused and gave a magnesium def description. Very sorry bout that.
Please dismiss my previous words.
It does look like a Mag def to me... not Potas.... and if it's on the lower 1/2 of the plant, that would seem to contribute to the Mag def argument. Do you use CalMag in your nutrient mix? I believe pretty much everyone that uses nutes adds CalMag.
 

c526

Member of the Month: Jan 2015 - Plant of the Month: Jan 2015
leaves will never recover,watch for the new growth

do you clean the runoff pans?? getting a higher ppm in the runoff is usually a indicator of a build up.
 

c526

Member of the Month: Jan 2015 - Plant of the Month: Jan 2015
dont get me wrong they are not crazy,the ph is stable for entering and exiting.wish you had a ph pen,I have very little luck in using the liquid tester.
 
u can get a cheap ph pen on fleabay for 10 bucks ..its is a must to montier your ph real close ..
you can get a ppm and a ph meter combo for 20 bucks . i just suggest getting some 7.o calibration fluid and check it every month .. i have the same combo and i have no issues .

u can test your water that you use with a ppm meter to judge it .
if u use ro water or low ppm water cal mag should be applied every watering /feeding.

here are a few charts to help you.

 
Thread starter #19
u can get a cheap ph pen on fleabay for 10 bucks ..its is a must to montier your ph real close ..
you can get a ppm and a ph meter combo for 20 bucks . i just suggest getting some 7.o calibration fluid and check it every month .. i have the same combo and i have no issues .

u can test your water that you use with a ppm meter to judge it .
if u use ro water or low ppm water cal mag should be applied every watering /feeding.
I do have a PPM meter if you read the post I mention my PPM readings several times.... What is low PPM? and what is high PPM?
My tap water is 60-65ppm and I usualy end up with around 300 and 500 PPM after addings nutrients. Depending on if I use 1ml of both BioGrow and Bipoheaven per litre or 2ml of both per litre of water.

I will buy a PH pen today, I live in Norway so 10 bucks and Ill get it next week.. So I have to spend 90 bucks so I get it today :(

Last 3 times I watered

4 October
Water had a PH of 6,4 and 520 ppm
Runoff had a PH of 6,4 and 570 ppm

6 October
Water had a PH of 6,6 and 61ppm
Runoff had a PH of 6,5 and 140 ppm

8 October
Water had a PH of 6,5 and 300 ppm
Runoff had a PH of 6,4 and 360 ppm
 
Thread starter #20
leaves will never recover,watch for the new growth

do you clean the runoff pans?? getting a higher ppm in the runoff is usually a indicator of a build up.
I thought the runoff would be higher unless the plant got 0 nutrients in the soil, and that would definitely cause nutrient deficiency or?