Hydroponics Question and Answer NewGrowth Style

**NewGrowth** · 02-16-2009, 09:02 PM

[QUOTE=Matty10;2092032]

Originally Posted by NewGrowth

Here is the guidelines to find proper PPM:

1.Water level drops PPM goes up: Drop your nutrient strength in relationship to the PPM rise.
2. Water level drops PPM stays the same: You may be able to fine tune you nutrient strength, if growth is vigorous leave it alone.
3. Water level drops PPM drops: Raise you nutrient strength in relationship too PPM drop.

Lets do some quick math with your readings start 1200 end 1350. 1350-1200= 150 total change ( a minor rise but still significant in only 24 hours)

Ok 1150 to 1290= 140 total change. An change of 50 ppm is giving you a 10 ppm flux in PPM drift. So 14 times 50 is 700. Does not necessarily tell you exactly how much to drop your PPM but give you a ballpark, I would drop by half that about 350 PPM. See how your plants respond and measure the drift like you have been. That would be 800 ppm you might have to go up a bit from there but it gives you a solid starting point. quote]

I appreciate the help, but I guess I am not understanding the math. Where did the # 14 and 50 come from? Also what number do I subtract from my ppm? I guess if you would try to explain it one more time, I would greatly appreciate it.

Thank You

Matt

Yeah I am not very good at explaining math. The 14 comes from 140 ppm that was your total drift divided by ten. I divided by ten because for every 10 ppm in drift you had adjusted by 50 ppm. Let me see if I can write an equation for the whole thing:
tc=total change(140 ppm)
f= flux(10ppm)
a=adjustment (50ppm)

tc/f *a=total/2

140/10*50=700/2= 350ppm

Originally Posted by erickw1822

Would someone take a look at these and give me some advice???

I would like to start flowering soon but i would like to fix the current problem...

THANKS!!!

EAZY FO SHEEZY!!

Need more information hard to tell with pictures of leaves you picked off. where it is happening give me more info about your set up.

Originally Posted by hatchbacknation

how long should i flush my system before harvest

Depends on a lot of factors, if you have a well dialed system a day will do fine. If you have a lot of salt build up then two weeks.

**Matty10** · 02-17-2009, 12:58 AM

Thanks New Growth, nice formula. I understand now.

Thank You,

Matt

**NewGrowth** · 02-17-2009, 02:05 AM

Originally Posted by Matty10

Thanks New Growth, nice formula. I understand now.

Thank You,

Matt

NG "fuzzy" math

Let me know how it works out.

**Matty10** · 02-18-2009, 01:48 AM

Originally Posted by NewGrowth

NG "fuzzy" math

Let me know how it works out.

Here is a question, or two, for you. What does it mean when you have small leaves? Again, my plants are 4 1/2 weeks old and are between 11'' to 1'3". I have 2 OG, 1 Jack the Ripper, and 1 white Widow. My Jack the Ripper is the second tallest and has small leaves. I remember reading somewhere that it is a sign on something negative, but cannot find where I read
this.

Also, I am growing in 6" Rock Wool cubes and it seems that my roots are not growing down into my hydroton. Any ideas? I mean roots are poking out of the bottom of the Rock Wool, but they stop there. My roots do not continue growing. Is there something wrong?

Thank You,

Matt

**Matty10** · 02-18-2009, 03:16 AM

Originally Posted by NewGrowth

NG "fuzzy" math

Let me know how it works out.

Ok so the other day we discussed PPM. I followed your directions and lowered the PPM down to 820. Today I checked the PPM and it has risen up to 960. So that is a difference of 140.
140/10 = 14
14*50 = 700 (these just so happen to be the same numbers we had earlier)
700/2 = 350

So now according to the math I should subtract 350 from my 820 PPM? If this is true then my PPM will be at 470. Not to mention that my tap water is around 310 PPM. Also according to my PPM chart for this past week I should be around 1200 PPM. Doesn't 470 seem extremely low for plants that started out as clones and have been growing for about 5 weeks now? Do you think may be my roots have locked out my nuets and that is why the PPM increases everyday? I NEED HELP, this is getting frustrating.

Thank You,

Matt

**karlt2005** · 02-18-2009, 03:51 AM

this thread is awsome keep up the good work NEWGROWTH, im just starting my new hydro garden now as my first grow was in soil and i didnt care for soil much ill be checking here daily. hopefully ill have some pics for you guys soon! KEEP UP THE GOOD WORK DUDE!!!!!

**NewGrowth** · 02-18-2009, 02:23 PM

Originally Posted by Matty10

Ok so the other day we discussed PPM. I followed your directions and lowered the PPM down to 820. Today I checked the PPM and it has risen up to 960. So that is a difference of 140.
140/10 = 14
14*50 = 700 (these just so happen to be the same numbers we had earlier)
700/2 = 350

So now according to the math I should subtract 350 from my 820 PPM? If this is true then my PPM will be at 470. Not to mention that my tap water is around 310 PPM. Also according to my PPM chart for this past week I should be around 1200 PPM. Doesn't 470 seem extremely low for plants that started out as clones and have been growing for about 5 weeks now? Do you think may be my roots have locked out my nuets and that is why the PPM increases everyday? I NEED HELP, this is getting frustrating.

Thank You,

Matt

Well some drift is to be expected. I agree 470 ppm would be very low for plants five weeks old. How much water are they using? The drift is consistent which is a good sign. How do the plants look? Is the growth healthy? I would run 820 and watch the rise over a few days, it might stabilize at some point. Do you have any Ph flux?

Originally Posted by karlt2005

this thread is awsome keep up the good work NEWGROWTH, im just starting my new hydro garden now as my first grow was in soil and i didnt care for soil much ill be checking here daily. hopefully ill have some pics for you guys soon! KEEP UP THE GOOD WORK DUDE!!!!!

Cool man keep us updated.

**NewGrowth** · 02-18-2009, 02:28 PM

Originally Posted by Matty10

Here is a question, or two, for you. What does it mean when you have small leaves? Again, my plants are 4 1/2 weeks old and are between 11'' to 1'3". I have 2 OG, 1 Jack the Ripper, and 1 white Widow. My Jack the Ripper is the second tallest and has small leaves. I remember reading somewhere that it is a sign on something negative, but cannot find where I read
this.

Also, I am growing in 6" Rock Wool cubes and it seems that my roots are not growing down into my hydroton. Any ideas? I mean roots are poking out of the bottom of the Rock Wool, but they stop there. My roots do not continue growing. Is there something wrong?

Thank You,

Matt

Just saw this one too. If your rock wool is over saturated it could be causing this. Any light getting to the rootzone can also stunt root growth. Are you pre-soaking your rockwool? Not sure what you mean by small leaves but deformed leaves indicate Ph imbalance. Do you have any pictures matty?

**karlt2005** · 02-19-2009, 08:40 AM

quick question i have a 400w mh for my veg, as soon as i see a sprut would you recommend putting the seedling under the mh or cfl? if cfl what wattage? im really unclear on this way to start my babies!