rkymtnman
Well-Known Member
take a black magic marker and put a period between the 0 and 1 on your display. now youv'e got 0.105EC
Quick question on PPM
- Thread starter A_String
- Start date
twentyeight.threefive
Well-Known Member
1000 μS/cm = 1 EC = 1 mS/cm
Last edited:
twentyeight.threefive
Well-Known Member
A lot of cheap EC pens are not capable of calibration.
Aye1frmDay1ny
Well-Known Member
Is that good or shud I add more water to bring it down. To 0.100ec ?
rkymtnman
Well-Known Member
this is just your tap water right?
Aye1frmDay1ny
Well-Known Member
Yea ... I mixed up my nuts in a gallon bucket measuring in mL as recomendable by the makers (Using general Organic to box I know not a good choice) before nutes water was 0105 uS/cm (0.105Ec i think )with a ph of 7.0. After I mixed the nutes it is at a 0222 uS/cm (0.222 I think ) with a 5.9 PH ... is this good ? Is this good for seedlings ? Am I off shud I raise my uS/cm to 1000 Which I think makes it 1.0 eC ?
rkymtnman
Well-Known Member
0.2 or 0.3 is what i use for seedlings. so you should be good.
Aye1frmDay1ny
Well-Known Member
Thank you so once they start to get into veg that's when I shud be getting to the 1000s uS/cm which equals to 1.0 Ec and so forth correct? When the EC drops and the Ph rises do I just add nutes or shud I empty my entire aero and make a new batch ?
rkymtnman
Well-Known Member
i've never done aero but i think your EC should be much, much lower than DWC or other forms of hydro. i would check in some aero threads to see what they run.
giantcola
Well-Known Member
Hey bro.
Nutrient chart should only give you the correct RATIO of nutrients, not quantity. to know how much ppms do you need, let your plants tell you! with some nutrient labels you only need something like 150 total ppms (500 scale) for clones going up till a maximum of 600 ppms for peak flower. Other labels will give the plants the right amount of food with 1500 ppms. Every plant is different. So, start low aiming for a 50% strenght of what recommended, going up till you get a little tip burn, then back down about 20%. Another more precise method is watching ppms of medium. if you grow in coco you check runoff, DWC check the reservoir. If you feed them 400 ppm and after one day you see that the res solution is about 300 ppms, it means that plants are consuming more nutrients than water = they may need more nutes.
If you give em 400 ppms and runoff or res water is really higher, then plants are consuming more water then nutrient and you may risk salt buildup so feed em lighter.
Hope to have been helpful!
Nutrient chart should only give you the correct RATIO of nutrients, not quantity. to know how much ppms do you need, let your plants tell you! with some nutrient labels you only need something like 150 total ppms (500 scale) for clones going up till a maximum of 600 ppms for peak flower. Other labels will give the plants the right amount of food with 1500 ppms. Every plant is different. So, start low aiming for a 50% strenght of what recommended, going up till you get a little tip burn, then back down about 20%. Another more precise method is watching ppms of medium. if you grow in coco you check runoff, DWC check the reservoir. If you feed them 400 ppm and after one day you see that the res solution is about 300 ppms, it means that plants are consuming more nutrients than water = they may need more nutes.
If you give em 400 ppms and runoff or res water is really higher, then plants are consuming more water then nutrient and you may risk salt buildup so feed em lighter.
Hope to have been helpful!
70's natureboy
Well-Known Member
At least you will know how it reads.
Aye1frmDay1ny
Well-Known Member
Thanks for help my friends are looking nice quick question when my ph and EC are rising rapidly what should I do ?
giantcola
Well-Known Member
if i'm not wrong 1000 ppms should be 2.0 Ec, being 1 EC = 500 ppms
70's natureboy
Well-Known Member
The internet has pretty much adopted that terminology because nobody can figure out how to use and apply calibration solution. Stoners and math do not go together.
twentyeight.threefive
Well-Known Member
It's fact, not adopted terminology. What does calibration solution have to do with a chart?
70's natureboy
Well-Known Member
try it bro, then you will see that you are actually measuring and talking .5 ppms.
twentyeight.threefive
Well-Known Member
I still have no idea what you are talking about. This is a conversion chart. There are multiple different PPM scales base on what your meter reads. Thanks.
70's natureboy
Well-Known Member
That correlates different meter readings to EC. Those aren't actual ppms
twentyeight.threefive
Well-Known Member
Lol ok. So it's just listed as ppm but not actually ppm.
Got it...