Scuba_Steve said:
So I am a bit confused. How do you measure these out? It says you can use some of the same stuff to cover multiple areas.
Calcium Nitrate for example. It is in the 190ppm NO3 and the 18ppm NH4. So would I add 208ppm? Plus another 170ppm for Ca?
yea its just math, you can do it with a spread sheet or with software. i use both from time to time.
let me pull up my mix.... ill link it below.
the math is easy, but you dont really need to learn it unless you really want to.
basically you get the mole fractions and the molar masses of the macro and micro ions and calculate the milligrams per liter per 1 gram addition to 1 gallon of water.
there are alot of youtube videos that exhaustively run through the math, i can find them for you if you like.
here is my mix.
Values calculated for the preparation of 1 gallons
Potassium Nitrate
KNO3
2.671
0.3
Magnesium Sulfate (Heptahydrate)
MgSO4.7H2O
1.92
0.2
Potassium Monobasic Phosphate
KH2PO4
0.8
0.1
Peters STEM
Input Formula Here
0.113
0
Calcium Nitrate (Tetrahydrate)
Ca(NO3)2.4H2O
3.514
0.4
N (NO3-)
207.866
9.40%
+/- 3.2%
K
333.599
-1.90%
+/- 3.1%
P
48.082
20.20%
+/- 4.7%
Mg
50
0%
+/- 3.2%
Ca
157.514
-7.30%
+/- 2.7%
S
69.844
-80.60%
+/- 0.7%
Fe
2.233
-55.30%
+/- 5.1%
Zn
1.34
306%
+/- 46.8%
B
0.402
21.80%
+/- 14%
Cu
0.685
1269.50%
+/- 157.8%
Mo
0.012
-76.20%
+/- 2.7%
Na
0
0%
+/- 0%
Si
0
0%
+/- 0%
Cl
0
0%
+/- 0%
Mn
2.382
333%
+/- 49.9%
N (NH4+)
0
0%
+/- 0%
EC=1.8 mS/cm
fuck. how do you insert a spread sheet without it fucking up like that?
i did it before... idk wtf im doing wrong.
here, pasted from note pad...
Values calculated for the preparation of 1 gallons
, , ,
,,,
Potassium Nitrate,KNO3,2.671,0.3
Magnesium Sulfate (Heptahydrate),MgSO4.7H2O,1.92,0.2
Potassium Monobasic Phosphate,KH2PO4,0.8,0.1
Peters STEM,Input Formula Here,0.113,0
Calcium Nitrate (Tetrahydrate),Ca(NO3)2.4H2O,3.514,0.4
, , ,
,,,
N (NO3-),207.866,9.4%,+/- 3.2%
K,333.599,-1.9%,+/- 3.1%
P,48.082,20.2%,+/- 4.7%
Mg,50,0%,+/- 3.2%
Ca,157.514,-7.3%,+/- 2.7%
S,69.844,-80.6%,+/- 0.7%
Fe,2.233,-55.3%,+/- 5.1%
Zn,1.34,306%,+/- 46.8%
B,0.402,21.8%,+/- 14%
Cu,0.685,1269.5%,+/- 157.8%
Mo,0.012,-76.2%,+/- 2.7%
Na,0,0%,+/- 0%
Si,0,0%,+/- 0%
Cl,0,0%,+/- 0%
Mn,2.382,333%,+/- 49.9%
N (NH4+),0,0%,+/- 0%
, , ,
EC=1.8 mS/cm
note the huge deviations in copper and some of the other micros.
this is because of the peters STEM micronutrient mix... you can do better with plantex CSM+boron... but its more expensive.
the copper deviation is not a problem though... its just more than necessary. STEM is what alot of greenhouses use, but you can buy the individual chelated micros if you want... will just cost a shit load more.
these are comma seperated values. every comma denotes a new value.
note that the third value in the salt break down is 'preperation cost' ignore that.
this is all from hydrobuddy btw. a free piece of software that should be available still.
