I ran out of calmag and they don't sell it in my country. Need help, deficiency's

dimebong

dimebong

Well-Known Member
I grow in coco and i've run out of calmag in week 5 of flower and my tap water is only 80-90 ppm (truncheon).

I usually order it off ebay but it takes 2 weeks to get here and i'm already starting to see
purple stems.

Can i use epsom salts and calcium sulphate from a brew supply's shop instead?

How much would i use for these plants in 4 gal pots and can you tell
me if that is infact a cal/mag deficiency. I use nutrifield coco A&B

DSCF1374.jpgDSCF1376.jpgDSCF1378.jpg
 
pSi007

pSi007

Active Member
tap water is fine. If you are concerned, you can let a 5 gallon bucket of tap water sit and evaporate the chlorine gas - 24 hours is plenty. Besides, you should be backing off the nutes and getting ready to flush.

80-90ppm is very good tap water.. Don't worry about the cal-mag. It is a $10 bottle of juice they sold you, which costs them about $0.10. Magnesium sulfate and Calcium carbonate are fine, you should be able to get it real cheap.
 
dimebong

dimebong

Well-Known Member
pSi007 said:
tap water is fine. If you are concerned, you can let a 5 gallon bucket of tap water sit and evaporate the chlorine gas - 24 hours is plenty. Besides, you should be backing off the nutes and getting ready to flush.

80-90ppm is very good tap water.. Don't worry about the cal-mag. It is a $10 bottle of juice they sold you, which costs them about $0.10. Magnesium sulfate and Calcium carbonate are fine, you should be able to get it real cheap.
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Yea i was getting a little annoyed paying almost the same (in cost and shipping, $25 for 250ml! :sad:) as the A&B base nutes.


So you think calcium carbonate is the one to get? I can get calcium nitrate, sulphate, chloride, and carbonate from the
store.

Btw i checked the tap water with a meter which came back at 61 ppm (truncheon) exactly which is probably something like
40 something ppm on your scale. Goes up to 70 in the water i let sit.
 
billy4479

billy4479

Moderator
calcium nitrate can be used in place of cal mag Calcium must be with in a 3/1 ratio with magnesium in order to be used properly by the plant . so if you were to add 3 parts calcium nitrate to 1 part magnesium nitrate you would have cal mag Cal mag also puts in EDTA chelate but that is to dissolve the iron the add to there product ..
 
jondamon

jondamon

Well-Known Member
Calcium nitrate is what most nutrient manufacturers use as the calcium source along with some N.

Be careful root drenching magnesium sulphate in coco. The last thing you need is more salt in coco.

If using the Epsom salts I would foliar feed it where you can.



J
 
dimebong

dimebong

Well-Known Member
billy4479 said:
calcium nitrate can be used in place of cal mag Calcium must be with in a 3/1 ratio with magnesium in order to be used properly by the plant . so if you were to add 3 parts calcium nitrate to 1 part magnesium nitrate you would have cal mag Cal mag also puts in EDTA chelate but that is to dissolve the iron the add to there product ..
Click to expand...
I can only find one local site that sells magnesium nitrate and they need 7 days production time plus shipping time but thanks
for the info, i can't believe how much of a rip off those calmag supplements are, 2 pound bags of cal and mag are only $10 each


jondamon said:
Calcium nitrate is what most nutrient manufacturers use as the calcium source along with some N.

Be careful root drenching magnesium sulphate in coco. The last thing you need is more salt in coco.

If using the Epsom salts I would foliar feed it where you can.



J
Click to expand...
Thanks bud. I might order that magnesium nitrate and grab a $3 bag of epsom salts for the time being.

Would mollases cover the plants cal mag needs for the time being?
 
jondamon

jondamon

Well-Known Member
dimebong said:
I can only find one local site that sells magnesium nitrate and they need 7 days production time plus shipping time but thanks
for the info, i can't believe how much of a rip off those calmag supplements are, 2 pound bags of cal and mag are only $10 each




Thanks bud. I might order that magnesium nitrate and grab a $3 bag of epsom salts for the time being.

Would mollases cover the plants cal mag needs for the time being?
Click to expand...
Possibly it would for the time being.


Oh and its calcium nitrate not magnesium nitrate.


You could also look if you can get magnesium monophosphate. I think that's a mono version of Mg.




J
 
dimebong

dimebong

Well-Known Member
jondamon said:
Possibly it would for the time being.


Oh and its calcium nitrate not magnesium nitrate.


You could also look if you can get magnesium monophosphate. I think that's a mono version of Mg.




J
Click to expand...
So many different versions of these elements haha.

This is what's available to me, doesn't have a monophosphate version though: http://www.nftgroup.co.nz/hydroponics/macro-and-secondary-nutrients.php

Oh and its calcium nitrate not magnesium nitrate.
Click to expand...
yea, i was referring to @billys suggestion to use the exact ingredients in calmag
 
ProdigalSun

ProdigalSun

Well-Known Member
What about vitamins??? I looked and have some Magnesium Calcium Zinc pills 500g. Why not just dissolve a dozen of them in a gallon of water and then feed?
 
jondamon

jondamon

Well-Known Member
ProdigalSun said:
What about vitamins??? I looked and have some Magnesium Calcium Zinc pills 500g. Why not just dissolve a dozen of them in a gallon of water and then feed?
Click to expand...
Depends whether once dissolved into water whether they're in an ionic form for uptake.




J
 
dimebong

dimebong

Well-Known Member
I was looking up the ingredients in those pills and most have magnesium oxide.

According to a thread i found on nutrients, magnesium oxide is the best stuff to use and i found a local
site selling a 2 pound bag for horses at $5. Good idea or no?

http://www.animalsupplies.co.nz/farm-animals/horse/supplements/other/magnesium-oxide-per-kg.html

EPSOM SALTS (Magnesium sulphate)
11%Mg, 2%Ca, 14%S Very versatile...some work into soil, but I don?t
recommend this as they leech easily...might as well just add with water.
Can also use as foliar feeder too. Good point is the neutral pH, but the
main drawback with Epsom is high salt index. Don't use too much,
especially in soil that dries quickly.......Its other drawback is the
slightly higher S to Mg ratio. We actually want 3-4 times as much Mg as
S....by using Epsom, you are necessitating another Mg source to balance
this....gets complicated as you need to be mindful of your other sources
of S and Mg....don't overlap and OD!

DOLOMITIC OR CALCITIC LIME
just look at the previous post for refresher....but be aware these raise pH

MAGNESIUM OXIDE
60% Mg....nothin else...pure, great for specific deficiency treatment.

MAGNESIUM NITRATE
10% Mg and 11%N....don't really see the point here...N is so easy to
provide with other salts or ferts.
Click to expand...
 
C

churchhaze

Well-Known Member
Calcium nitrate is invaluable to hydro growers...

look on the back of the cal-mag bottle... that shit IS calcium nitrate.

In other words, calcium nitrate is a DIRECT REPLACEMENT for what provides calcium in the "cal-mag- products.

dimebong said:
Yea i was getting a little annoyed paying almost the same (in cost and shipping, $25 for 250ml! :sad:) as the A&B base nutes.


So you think calcium carbonate is the one to get? I can get calcium nitrate, sulphate, chloride, and carbonate from the
store.

Btw i checked the tap water with a meter which came back at 61 ppm (truncheon) exactly which is probably something like
40 something ppm on your scale. Goes up to 70 in the water i let sit.
Click to expand...
 
C

churchhaze

Well-Known Member
The threshold for Ca:Mg I've noticed when making my own nutrient solutions is between

1:0.20 (min Mg)
1:0.40 (max Mg)

I use software (hydrobuddy) to come up precise solutions. All their sample formulas as well as all my homemade formulas fall within those ratio thresholds.

billy4479 said:
calcium nitrate can be used in place of cal mag Calcium must be with in a 3/1 ratio with magnesium in order to be used properly by the plant . so if you were to add 3 parts calcium nitrate to 1 part magnesium nitrate you would have cal mag Cal mag also puts in EDTA chelate but that is to dissolve the iron the add to there product ..
Click to expand...
 
C

churchhaze

Well-Known Member
You don't need magnesium nitrate. That stuff is way more expensive than magnesium sulfate and will serve teh same purpose. Chances are you don't have too much sulfates.

dimebong said:
I can only find one local site that sells magnesium nitrate and they need 7 days production time plus shipping time but thanks
for the info, i can't believe how much of a rip off those calmag supplements are, 2 pound bags of cal and mag are only $10 each




Thanks bud. I might order that magnesium nitrate and grab a $3 bag of epsom salts for the time being.

Would mollases cover the plants cal mag needs for the time being?
Click to expand...
 
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