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A question for the growers using Jacks 5-12-26
- Thread starter Jabapc
- Start date
MPL
Member
uS = Microsiemens, which is a measure of electrical conductivity (EC). Specifically, it's microsiemens per centimeter (uS/cm).
You can't convert uS to EC, because uS is a direct measurement of EC. You can convert microsiemens to siemens etc. by moving the decimal.
You can't convert uS to EC, because uS is a direct measurement of EC. You can convert microsiemens to siemens etc. by moving the decimal.
Are you figuring 1:1 with volume or weight? And can it by done by ec?
Trich_Tyson
Active member
Ec.. last night I filled up added 300 ppm jacks.. 300 ppm cal nit. 1 ml/g silica. And a sprinkle of epsom. Done
hello everyone. ive been a long time jacks user but have recently switched over to high power COB LEDs and now im getting some crazy shit going on.
i have always ran around 900ppm/1.8 ec and NEVER had any issues or deficiencies. now its like EVERYTHING is getting deficiencies. first i had people tell me it was burns so i lowered it down and everything almost died. i nursed them all back but they are still looking weak.
the garden stays right at 80 degrees and 60% humidity.
right now i am doing thw 1/.64 ratio i think.
i do 1.1 ec of jacks and .7ec of calnit. then i am adding about 150ml of calmag to about 25 gal of base nutrients.
any input is much appreciated. thanks everyone!
i have always ran around 900ppm/1.8 ec and NEVER had any issues or deficiencies. now its like EVERYTHING is getting deficiencies. first i had people tell me it was burns so i lowered it down and everything almost died. i nursed them all back but they are still looking weak.
the garden stays right at 80 degrees and 60% humidity.
right now i am doing thw 1/.64 ratio i think.
i do 1.1 ec of jacks and .7ec of calnit. then i am adding about 150ml of calmag to about 25 gal of base nutrients.
any input is much appreciated. thanks everyone!
Attachments
Any big difference in the par between your old light and the cob?
Growing in coco or turface or ...?
For this round you may want to be careful with the extra cal-mag as it could speed up cell death (if these are the same plants that almost died.) The calcinit should be enough. A mag or light langbeinite foliar couldn't hurt but you look like you're fairly close to harvest. I'd ride this round out and rebuild your recipe on the next round.
Growing in coco or turface or ...?
For this round you may want to be careful with the extra cal-mag as it could speed up cell death (if these are the same plants that almost died.) The calcinit should be enough. A mag or light langbeinite foliar couldn't hurt but you look like you're fairly close to harvest. I'd ride this round out and rebuild your recipe on the next round.
Ganjaganjakush
Active member
its the cal mag, get rid of it there is no need jacks has everything and the cal mag is messing with ur ratios
i started adding the cal mag after the issue. this round is almost over. next round i will run just jacks and nothing else at the proper ratio but high strength and see what happens.
Trich_Tyson
Active member
Skip he cal mag. If you need one or the other treat accordingly. Increase cal nit or epsom as needed. That's a lotta what's in cal mag anyway
Adding stuff changes ratios
Adding stuff changes ratios
Bingo.
Trich_Tyson
Active member
And fwiw - I don't have all that much exp - but I've grown plants trying to "push" them to their max with high ec and boosters n shit. This run I finally focused on environment and fed (less than) barely enough. They slowly yellowed from the bottom up from early flower.
Plants came out looking, tasting, yielding, and more potent than ever. And the enviro is still far from dialed.
Plants came out looking, tasting, yielding, and more potent than ever. And the enviro is still far from dialed.
Student Of Life
Member
You in coco? That looks alot like salt buildup to me.
I've been running jacks 321. Ph going in is around 6.0. Ph coming out (runoff) is 7.0. Not showing any issues with plant health. I've tried flushing with half strength at 5.5 but it's not bringing it down. Other than that no difference is seen with jacks vs ionic yet. Anyone else have this runoff issue?
Absolem
Active member
If you are running any sort of recirculating system this is a good sign of healthy plants that are not over fed. Plant nutrients are acids. Acids bring the pH down. Example is using phosphoric acid. As the plants eat those acids the pH will rise and the EC will decrease.
Sorry I didn't mention but I run coco dtw.
I've been running Jack's for 2 years now. In the begining I listened to all the talk about 3-2-1, tried that shit never ever worked right for me, my plants always seemed under fed. Now I may get slack on this but I found if I run Jack's at 1tbs per 5 gallon and also 2.5tsp per 5 gallon of calnit all problems went away. I do not use epsom anymore, have'nt had any issues what so ever concerning magnesium. I also run with fulvic acid and thats it. I found the 3-2 recipe works very well for me in veg but not flowers. I ran Jacks high when I first started using and actually got very decent results but did'nt like feeding that high so went the 3-2-1 route which was disaster, very weak structure, small bud sites, insufficient root structure, late finishing. Just all kinds of probs. My recipe now is basically once broken down about 5 grams per gal Jack's and 3 grams per gal calnit. Now I don't get into the weight of nutrients more so volume now when I measure. I found doi g this way with those ratios I do not have to ph, it is always stable at 5.9-6.1, never gets out of those ranges, don't use up or down anymore, no need. This is ran in coco
PEACE!
PEACE!
Lots of great info In your post. To this point I'm loving the 321 but I'm just finishing with stretch and stacking up very nicely now. Are you running with ro?
Absolem
Active member
Mixing Jack's 5-12-26 @ 5grams/gallon and Jr Peter's Calcium nitrate @ 3grams/gal gives these numbers.
.....Jacks's 5-12-26..........Calcium Nitrate........Total
N.......66...............................123..................189
P........69.................................0....................69
K......285.................................0...................285
CA......0................................143..................143
MG.....83.................................0....................83
S......108.................................0...................108
.....Jacks's 5-12-26..........Calcium Nitrate........Total
N.......66...............................123..................189
P........69.................................0....................69
K......285.................................0...................285
CA......0................................143..................143
MG.....83.................................0....................83
S......108.................................0...................108
Trich_Tyson
Active member
Thanks waxy. I thought I posted last night evidently not. I was wondering what the ec or gram ratio was there.
I bumped my calnit to almost 1:1 jacks : calnit. Plants really dig it in veg at least.
Did you lower the calnit ratio or increase md?
I bumped my calnit to almost 1:1 jacks : calnit. Plants really dig it in veg at least.
Did you lower the calnit ratio or increase md?
