Crysmatic
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I will be running this (all in per gallon values):
2.5 grams hydro
2.13 cal nitrate
.2 Cacl2
.095 MKP
.55 k2so4
.71 epsom salts
.005 MOST
which will give me 120-40-210-120-60 and the sulfur will be at 103.
this is per manufacturers directions. So much fucking around... trying to be a mad scientist. its not working so I am gonna follow some directions (not all) from the people who are celebrating their 65th anniversary in fert blending.
My goal is to have all the plants thriving. No yellowing, no toxicities, no deficiencies, all the way through.
haha, T does know what he's talking about though (while i had to waste $2 on the wrong 4lb box first)
pretty sure i have that covered with mgso4, most, calnit, cacl. i used to buy botanicare cal-mag cause everybody said-so, last jug ran out about a year ago and haven't missed it.
Yeah I still have a half of a big ass jug. I dont use it anymore. I dont "charge" my coco either with any cal mag. I just water with pH'd nutes from day one. I water to run off. Thats it. All my plants in coco stay really green and healthy. The RDWC and my other custom system... thats a different story.
...which is starting to make me wonder WTF- why not just run coco and be done with it?
I guess I'm a little like JK that way. I like the challenge. If I start something, I like to try and master it before I quit.
wait a sec... I thought my elemental ppm ratio was closer to 3-1-5? is that the same thing as % 1-2-2.75?
I am working at it!!!!!:eek:
I have changed up the formula a little more. Constantly changing it really... TOday I tried a tank with 1971's formula for veg (#'s not actual salts). I was able to come very close to his ratios with just jacks and MKP and K2so4.
if your elemental ppm is 300-100-500 (3-1-5), then it's 3.0-2.3-6.0 %NPK. (ratio is 1.30-1-2.60)
if your %NPK is 1-2-2.75, then your ppm will be 100-87.2-228.25 (ratio is 1.15-1-2.62)
a quick check is this: take %NPK, multiply by 100 to get salt ppm. eg 3-1-2 becomes 300-100-200. multiply P2O5 by 0.436, and K2O by 0.83 to get P and K. i.e. 300-43.6-166 is your N-P-K ppm. then divide by the smallest number to get your ratio. i.e. 6.88-1-3.81. You can also work backwards to quickly convert ppm to %NPK.
the 100 is just an arbitrary number that makes the math easy. it doesn't affect ratios.
Good job tweaking the formula to give you better results. I found it's not a particular NPK ratio, but that all the elements are playing nice with each other, and the plant...and also with the medium in your case. Knowing the exact ratios is secondary to having a formula that works (witness all the growers using AN). It's when it *doesn't* work that you need to know exact ppm - so that you can adjust it with a measure of control and certainty. Maybe you can go back and see what you've been changing, to see where you've been making progress, and continue in that direction. GL
Would you mind sharing this adjusted formula? How much K2SiO3 are you using?The second formula I am runnign where I compensated for the silica... that one is doing really really well. I am very much liking it.
Would you mind sharing this adjusted formula? How much K2SiO3 are you using?
Thanks. I'm not sure how to interpret which sections' listed substances are included - notes says ".2 grams/gal cacl2" but it's not in the above list, and there's .5 g/gal of MgSO4.7H2O listed on the second page that I'm also not sure if is included.I am running this at around 80% and plants are really loving it. Ill take some pics later to post up here.
Those plants look great. I'm still not sure where all the sulfur is coming from though. I'm calculating 24 ppm via K2SO4 and 17 ppm via MgSO4.7H2O for a total of 41 ppm total sulfur.
Ah, that must be what I'm missing. Do you know how much? I don't see the numbers on the guaranteed analysis on their website - - although it does say "Supplies magnesium and sulfur"...the jr peters hydro has sulferas well.
that last plant..
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