Lucas formula deficiency help

Hello dwc noob here, I'm using lucas formula and I am noticing a deficiency just wondering if you guys can help me out. It's not 100% lucas formula I'm using GH micro/bloom at 1-2 up to 850 ppm when I use 8/16 per gallon I only get 750 ppm so I add 1-2 ratio util 850. possible mag def? I also have a bottle of GH grow i can add or calmag just not 100% sure what to use. Any idea would be great thanks! Oh side note nutradip trimeter model 202 I'm not sure which conversion it is.

-1000 watt x 12 plants
- water temps 62f- 71f i am using Heisenberg tea/air temps 72-80f
- 3 master kush 9 purple kush master kush seems to show more deficiency
- 12 x 5 gallon pails with 3.5 gall per bucket.
- 20 watt + 36 watt air pump
- tap water ppm 30-40ppm

pics

check your water PH.................and maybe check your stuff on micbo......those are the 2 main cuases of hydro system going out of wack

Phosphorus and magnesium. Both available ideally at 5.8-6.1.

Get your PH in check.

I res change each week ph after nutes at 5.7 hoping it would rise to 6.0? never happened just stays steady at 5.7, ph meter freshly calibrated too. Should I manually raise ph to 5.8-60?

If your PH is that steady keep it at 5.8.

If you find your PH is dropping instead of rising then start it at 6.1 and let it work down. If rising then start at 5.6.

Thanks for the answers, Ill give it a try. I shouldnt add calmag then?

I usually run Lucas @ 8/16 regardless of PPM, and add 1ml CalMg per gallon.
The difference, is that I use R/O water. Yes, your tap water has a low ppm, but there are still things
in it that can fuck with your pH. If you have a tri-meter (I also use one) you should easily be able
to see if your pH is off.

If your pH is sitting at 5.8 steady, then good, you're pretty much dialed in on your nute ratio
for now. That, to me, suggests that you may need to supplement specific elements, as your
strain may want more than it's getting.

SIDE NOTE: If your pH is dropping rapidly it may be pythium. A good dose of food grade H202
should fix that.

I'm using more of a 9.4/18.8 micro/bloom to hit 850ppm. I do a res change every week and calibrate my tri meter every 2 weeks,
I also have a second ph meter that is reading 5.5 but I decided to trust the trimeter so worst case scenario is that I'm in 5.5-5.7 ph range, I saw on a
chart 5.5-5.7 is no ideal for mag uptake thats why i thought maybe I should add some
I had just adjusted ph to 5.8 would .1 off ph make a difference? feels like I should add calmag but im a noob lol.

tommyy said:

I'm using more of a 9.4/18.8 micro/bloom to hit 850ppm. I do a res change every week and calibrate my tri meter every 2 weeks,
I also have a second ph meter that is reading 5.5 but I decided to trust the trimeter so worst case scenario is that I'm in 5.5-5.7 ph range, I saw on a
chart 5.5-5.7 is no ideal for mag uptake thats why i thought maybe I should add some
I had just adjusted ph to 5.8 would .1 off ph make a difference? feels like I should add calmag but im a noob lol.

Click to expand...

Calmag is good. I used it at 1ml/gal to start like 3 weeks from seed all the way to 5ml/gal in heavy flower.

And yes .1 PH is going to make a difference. Phosphorus is also not available at 5.7, which is why your stems are purple.

firsttimeARE said:

Calmag is good. I used it at 1ml/gal to start like 3 weeks from seed all the way to 5ml/gal in heavy flower.

And yes .1 PH is going to make a difference. Phosphorus is also not available at 5.7, which is why your stems are purple.

Click to expand...

I'm kind of curious as to why you're saying phosphorous is not available at 5.7pH - That's absolute rubbish. Some genetics have purple
stems inherently, and it is not assured that it is a phosphorous deficiency, although it may be a possibility.

https://www.icmag.com/modules/Tutorials/NutrientFormsulations/327_files/dualph10.jpg

Well I decided to try and add 15 ml GHgrow to one bucket and 2.5ml calmag in another and left the rest ph 5.8 to see
what happens in a week, Ill keep you posted.

I've ran the Lucas formula for years, rather than adding more stuff you don't need or can't utilize, I have been noticing the mix today does better at 6.1ph. I used to keep it lower but since they redid the micro a little things seem to go way better at a slightly higher ph

Ok kinda a good idea ill just adjust another bucket to a higher ph and see how it goes.

tommyy said:

Well I decided to try and add 15 ml GHgrow to one bucket and 2.5ml calmag in another and left the rest ph 5.8 to see
what happens in a week, Ill keep you posted.

Click to expand...

If you're adding GH Grow, then you're no longer using Lucas formula. How many gals are your containers?

I'm kinda confused on what is the lucas formula, is it just as a 1-2 ratio or has to be 8/16 because I'm actually using 1-2 ratio micro bloom up to 850ppm and I added 15ml grow in one bucket to see the results 3.5 gallon per 5 gallon bucket.

edit: so now I have one bucket with calmag, one with ph 6.0, and one with extra 15ml grow bringing the ppm to 970 this bucket res nutes is 4.2 grow 10 micro 20 bloom ml/gallon. Just hoping for a solution. All other buckets are ph 5.8 steady and ppm dropping very slowly.

Well here's and update, none of the plants got any better I'm really stumped on whats going on hope someone can solve this.
Are these plants too far gone to save? I tried calmag 250ppm lucas 8/16 micro/bloom total ppm 950, it did not help.
I tried 5/8/16 no luck. Also 850 ppm 10/20 lucas with 2.5ml cal mag didn't work either. Also tried ph 6.0 on one bucket straight lucas and it showed signs of ph problem.
anyone have any idea what else I should try to get to the bottom of this? This is end of 3rd week vegg all stunted growth and are showing signs of
sickness.

I should mention I vegg them for one week in bcnl producer 400mh/400hps and then switch to 12 single site dwc 1000 watt hps.
they seem to do fine for first week under 1000 watt hps and 2nd week under hps is when deficiency starts. Really hope someone
can help fix this.

I run 8/16 lucas with 5ml of cal-mag... although i do not used any medium just water so i also use 29% h202 weekly. If i were you i would suggest h202 or check water temps. I had that same looking def. And i added some more cal-mag and nee growth was fine.

I used heisenberg tea so h2o2 wont work but I did see signs of bacteria would that cause the deficiency?

ricky6991 said:

I run 8/16 lucas with 5ml of cal-mag... although i do not used any medium just water so i also use 29% h202 weekly. If i were you i would suggest h202 or check water temps. I had that same looking def. And i added some more cal-mag and nee growth was fine.

Click to expand...

Hey man when I add h202 do I add it to water only res or throw it in with the normal nutrient res?? If you are still around