Homemade cal mag How much ?how strong?

Bignutes

Bignutes

Well-Known Member
cannabineer said:
I’m not sure. The algorithm is tuned for a mix of mono-and divalent ions. I would approximate bu dividing by 3. Then there is a correction factor for the molecular weight of your ion.
I don’t know how to do that bit. My area is organic synthesis ... different skill set,
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Is this where the milliequivalent comes into play, taking the molecular weight and number of charges to figure out ratio of acetic acid to calcium?
 
Bignutes

Bignutes

Well-Known Member
I think if you weighed the egg shells before and after vinegar reaction and multiplied by the 40% ratio of calcium in the egg shell this would give you the amount of dissolved calcium in end solution and the resulting ppm. Something like 100 grams of egg shell go in, 20 grams left over, so 80 grams go into solution, multiply by .40 so 32 grams of calcium in solution. If you have 968 grams of vinegar then you have a 32g/(968+32)x100= 3.2% solution of calcium. This equates to 3.2 x 10,000 to get ppm = 32,000 ppm. Does this seem logical @cannabineer?
 
cannabineer

cannabineer

Ursus marijanus
Bignutes said:
I think if you weighed the egg shells before and after vinegar reaction and multiplied by the 40% ratio of calcium in the egg shell this would give you the amount of dissolved calcium in end solution and the resulting ppm. Something like 100 grams of egg shell go in, 20 grams left over, so 80 grams go into solution, multiply by .40 so 32 grams of calcium in solution. If you have 968 grams of vinegar then you have a 32g/(968+32)x100= 3.2% solution of calcium. This equates to 3.2 x 10,000 to get ppm = 32,000 ppm. Does this seem logical @cannabineer?
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It won’t get that strong if you use the usual 5% vinegar. A liter is fifty grams (5/6 of a mole) of acetic acid. That can ideally dissolve 5/12 of a mole of calcium carbonate for a final Ca dose of 16.7 grams = 1.67% Ca.
 
Bignutes

Bignutes

Well-Known Member
That was just an example, the end weights would tell you the resulting ppm which would look like it would be at or below the 1.67%
 
W

waktoo

Well-Known Member
Tonycannavis said:
Today I made my first organic cal mag With the eggs vinegar The whole shebang my question is how do you determine the dosage ? And How strong it is ?don’t wanna mess up my plants Didn’t really read much about how much to feed on anybody done it before ? Any pointers appreciate it
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Don't know where the "mag" is coming from, but water soluble calcium should be applied as a foliar spray during flowering stage, not to the soil.

3/4 teaspoon/gallon is the solution mix.

 
Tonycannavis

Tonycannavis

Well-Known Member
I been using it every couple feedings other than the ph dropped I have no issues All the great information people been sharing on this thread is amazing I didn’t think this threat I was going to get this far thankful for all you that have been sharing your knowledge hopefully people get a better understanding just like I have by reading this thread 165BE4BF-95D2-48E0-A24E-9B7674B90105.jpeg
 
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