Yeah, doing the math really sucks...
Anyway, I've made some calculations and I've come up with two recipes; one for the seedling phase and one for the flowering phase. In fact I just took the veg formula recipe from Chemist's Salt Fertilizer Recipe as my seedling solution, and I added some N and P to the flower mix- cola diet recipe for the flowering solution. (used NaNO3 for N, and (NH3)3PO4 for p)
NaNO3 - 15% N meaning 15-0-0 meaning 1 grams/liter= 150ppms
(NH3)3PO4 - 10% N, 45& P meaning 10-45-00 meaning 1 grams/liter= 100ppms of N, 450 ppms of P)
I used these calculations (above) in my recipe, hope it is correct??
Anyway, I will be growing 1 lowryder2 (yes only 1
) first 2 weeks, the seedling mix, next 4-5 weeks the flower mix.
Seedling mix recipe: 20lt's worth - won't be needing that much
CaNO3.4H20 - 20 g
KH2PO4 - 4.10 g
K2SO4 - 6.0 g
MgSO4 - 7.0 g
MES Buffer - 2.0 g
(N:100 P:50 K:212 Ca:143 Mg:75 S:11
TOTAL PPM: 700ppm
(the numbers are rounded, they aren't precise)
Flower mix recipe: 20lt's worth
CaSO4.2H2O - 8.16g
MgSO4 - 14.8g
K2SO4 - 1.0 g
CaNO3.4H20 - 12.2g
MES Buffer - 2.0 g
this formula gives (N 75 P 100 K 150 Ca 200 Mg 75 S 185)
I want N 200ppm and P 400ppm for flowering, so I add:
NaNO3 16.6 g 16.6g/liter gives 16.6x150= 2490ppm, in 20 lts reservoir it contributes 2490/20= 124.5ppm
(NH3)3PO4 13.5 g 13.5g/liter gives 13.5x450= 5625ppm, in 20lt reservoir it contributes 5625/20= 280ppm P and 13.5x100/20= 67.5 ppm N
adds up to:
N 140 P 380 K 150 Ca 200 Mg 75 S 185
Do you think this will be a proper mix? I don't know if NaNO3 or (NH3)3PO4 will precipitate with something so if anyone knows please warn me
If people suggest that I don't use this formula, I will buy any nutrient I can find (not much choice where I live) and use it. An contribution or comment or advise is much appreciated!