_EQ
Well-Known Member
No none of the fans are yellowing as a whole just the tips I never let it go totally dry either. Usually I feed every other day.
HELP! Can’t diagnose plant probz
- Thread starter _EQ
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kovidkough
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whats the base ppm of your water, is it RO?
_EQ
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No it’s hard water base ppm is like 670 roughly
kovidkough
Well-Known Member
kovidkough
Well-Known Member
ok woah hard water sucks. gotta redo the math abit
kovidkough
Well-Known Member
so in total your feeding 400 of everything with 600 as your base ? that seems awful low
_EQ
Well-Known Member
Forgive me this is my very first grow so I’m vanilla in terms of PPM calculations and such can you explain to me how you got the numbers?
kovidkough
Well-Known Member
measure the ppm of your tap plain this will give you the base ppm. the feed chart for flower suggests 1.3 -1.7 ec for beginning of flower so we want to end up at that. your meter should convert ppm to ec on a 500 or 700 scale. so we add enough feed to get to 1.7, how ever you have hard water and its going to mean you have to sacrifice alot of ppm for this to be balance because we can fit alot of food ppm in the equation so as to not get above 1.3-1.7
kovidkough
Well-Known Member
What does the term Parts Per Million (PPM) mean?
It is a common unit for measuring the concentration of elements in the nutrient solution. One ppm is one part by weight of the mineral in one million parts of solution.
How do I convert between TDS and EC readings?
To obtain an approximate sodium chloride TDS value, multiply the EC reading (in milliSiemens/cm) by 1000 and divide by 2.
To get an EC value, multiply the ppm reading by 2 and divide by 1000.
Thus, if your EC is 1:
1*1000/2= 500 ppm.
And if your ppm is 500:
500*2/1000= 1 EC
It is a common unit for measuring the concentration of elements in the nutrient solution. One ppm is one part by weight of the mineral in one million parts of solution.
How do I convert between TDS and EC readings?
To obtain an approximate sodium chloride TDS value, multiply the EC reading (in milliSiemens/cm) by 1000 and divide by 2.
To get an EC value, multiply the ppm reading by 2 and divide by 1000.
Thus, if your EC is 1:
1*1000/2= 500 ppm.
And if your ppm is 500:
500*2/1000= 1 EC
kovidkough
Well-Known Member
what scale is your meter ?
_EQ
Well-Known Member
kovidkough
Well-Known Member
1000ppm is 1ec so measure just your tap
_EQ
Well-Known Member
Okay will do that now
kovidkough
Well-Known Member
my tap usually comes out out at 90ppm so I think you may need nutrients for hard water. I mean your plant is by no mean bad condition. so I'd just keep an eye on it and keep a journal of what you feed
kovidkough
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eventually you can follow if your plant is eating or not or if your problem is salt build up related. because schedules are difficult to follow to a tee and each pheno feed differently. vpd also effects water uptake so if your temp and humidity are out of line then it won't drink correctly
_EQ
Well-Known Member
kovidkough
Well-Known Member
kovidkough
Well-Known Member
everytime you add a different brand write down the ppm so you know how much each product adds
kovidkough
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that way you can say reduce your ppm of calmag and know how to add back with something else
kovidkough
Well-Known Member
btw we use exactly the same nutes i use mega crop and flower fuel but none of the other stuff cause I run perlite not coco, but I've been feeding 700ppm MC and 500Ppm flower fuel this is my result in week 4 flower now
