Caclium and magnesium problems.

mia1998

mia1998

Member
I have problems with calcium and magnesium. I use the food line Canna Coco a & b. I am growing on Cocos from atima. Now i bought extra supplements from canna mono calcium and separated magnesium. How do I ensure that I know what I can give extra and what ratio from each other.

Canna Coco A & B https://www.canna-uk.com/coco_a_b
Canna mono Calcium / Magnesium https://www.canna-uk.com/mononutrients

They say don't give the exact what the producer is writing and what are the ratio from Calcium to magnesium ?
 
kingromano

kingromano

Well-Known Member
with coco you want a base water of 0.4mS minimum

so you measure the conductivity of your tap water, if it is under 0.4mS, add it the calcium magnesium until your get 0.4mS on the tester. then add your A+B
 
kingromano

kingromano

Well-Known Member
you don't need calmag
just use canna a+b
add around 1.0mS over the 0.6mS of your tap, and water everytime with big runoff
 
kingromano

kingromano

Well-Known Member
your tap probably contain enough calcium and magnesium.
it also can be ph related ..
there is small chances that you have both calcium and magnesium deficiency .. only one of the 2
is that rust spots on middle fan leaves or interveinal chlorosis ?

photo would help
 
mia1998

mia1998

Member
kingromano said:
your tap probably contain enough calcium and magnesium.
it also can be ph related ..
there is small chances that you have both calcium and magnesium deficiency .. only one of the 2
is that rust spots on middle fan leaves or interveinal chlorosis ?

photo would help
Click to expand...
Send tommorow photo at bed now. I have both but not on the same plants
 
Rurumo

Rurumo

Well-Known Member
Your tap might have enough calcium, but not enough magnesium. Impossible to say without seeing an analysis. Calmag usually has a 2 to 1 ratio of cal to mag. What symptoms are you seeing? I doubt you are seeing both calcium and magnesium deficiency symptoms. My water is similar to yours and I just need to add a little magnesium, but my nutrients have more cal/mag than yours to begin with too.
 
Star Dog

Star Dog

Well-Known Member
My water doesn't trigger my blue lab but I don't need calmag, when I tried it on a plant it didn't like it, it looked like shit.
 
kingromano

kingromano

Well-Known Member
no calcium nor magnesium def here
just salt accumulations in the coco
prepare a solution of 1.5mS (total) and flush heavily each pot
measure the runoff
as long the runoff is superior to 1.5mS keep rinsing
 
Star Dog

Star Dog

Well-Known Member
mia1998 said:
3 times a week i give water. 2 times ec 2.5 end 1 time 0.6
Click to expand...
That’s is your problem!
Far to strong and not frequent enough... You get away with missing it occasionally but on the whole feeding needs doing daily to run off.
If you follow @kingromano advice post #11 you'll get on back on track, personally I'd use 1.2ec but either daily is moving in the right direction.
There's a link kicking about the forum regarding coco growing, anyone have it?
 
kingromano

kingromano

Well-Known Member
mia1998 said:
3 times a week i give water. 2 times ec 2.5 end 1 time 0.6
Click to expand...
yeah and never water coco with plain water .. big mistake, you disrupt the cec in the coco

you need consistency, each feed must be around 1.5mS ph 5.8 with a big runoff .. i insist on big runoff
you can recover the runoff and reuse it for later (just reset the ph/ec values)
 
mia1998

mia1998

Member
Guys i grow under led. Geekbeast pro 630 Watt. I give always PH 5.8 on cocos. Now per week wich ec value you would do? Lets take an example My water has an ec value of 0.6 i want to add nutrient how much for the first week and how build i this up for the next weeks.
 
Sif1

Sif1

Well-Known Member
kingromano said:
no calcium nor magnesium def here
just salt accumulations in the coco
prepare a solution of 1.5mS (total) and flush heavily each pot
measure the runoff
as long the runoff is superior to 1.5mS keep rinsing
Click to expand...
What is mS? I use PPM, EC and CF.
 
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