Magnesium Toxicity?

fry925

Member

• May 25, 2013

• #1

Hi just for fun I've been growing with just plain tap water. I have no idea what the pH of the soil is but the pH of the water is around 7.8. Is this from too much magnesium or salt buildups?? I have never added any fertilizers to this plant....only good fox farm soil.

 

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Yodazherb

Active Member

• May 25, 2013

• #2

Not sure how you would get to much of anything with just water, unless the soil was hot to begin with.
Prob with that high of a ph in soil is stuff getting locked out.
https://www.rollitup.org/attachment...trient-deficiency-toxicity-nutrient-chart.jpg

 

Slipon

Well-Known Member

• May 25, 2013

• #3

don't you mean Mg deficiency ?


and if she have`t got any nutrients yet, I would look in to that to, some basic bloom nuts and a bag of Epsom salt would probably do wonders


http://www.thctalk.com/cannabis-forum/showthread.php?49-Magnesium-(Mg)

 

fry925

Member

• May 25, 2013

• #4

Toxicity because I can't see there not being enough calcium or magnesium in my tap water. It looks like too much of something to me....almost like nutrient burn but I haven't been adding nutes so I don't see that being possible

 

fry925

Member

• May 25, 2013

• #5

but then again I don't know what the fuck i'm talking about....thats why im here

 

GandalfdaGreen

Well-Known Member

• May 25, 2013

• #6

I used to have that happen with FFOF. Get your ph right. Can you buy a few gallons of distilled water and use that for a week or two? FF is loaded with nutes only for the first month or so. Add the bloom nutes at half dose and a little mag/cal at half dose. Do you know the actual ppm of your tap water? I am not a big add things guy but Slipon knows his shit.

 

fry925

Member

• May 25, 2013

• #7

ppm is actually 425 and pH is 8

 

tallstraw

Active Member

• May 25, 2013

• #8

^ You're lucked out bub :/

 

fry925

Member

• May 25, 2013

• #9

How so? I feel pretty unlucky considering that used to be my healthiest plant.

 

hyroot

Well-Known Member

• May 25, 2013

• #10

Looks like phos and molybdenum def. More nutes

 

GandalfdaGreen

Well-Known Member

• May 25, 2013

• #11

No way. Just water with distilled water and get a RO system. The nutes are in there. The plants just cant get to them.

View attachment 2671963

 

C

churchhaze

Well-Known Member

• May 25, 2013

• #12

People here never have P def... lol. They have WAY too much P, always.

It's high P that causes all the problems.

Also, Mo def is a myth as far as I can tell. Who here has ever solved a problem by adding only molybdate?

 

fry925

Member

• Jun 3, 2013

• #13

what is that gonna do?

 

GandalfdaGreen

Well-Known Member

• Jun 3, 2013

• #14

ppms and ph like that is reeking havoc on that poor thing. Until you get RO or buy distilled water and get those right it is going to destroy your smoke.