So subtract the water's base ppm to determine correct nute ppm?

RemeberMe

RemeberMe

Active Member
Am I supposed to maintain 700 ppm with or without water ppm added in to total ppm? Like if the base water has 250 ppm do I just add another 450 ppm of nutrients to make 700 which is considered max for vegging??
 
Wait, now I thought it was completely obvious that the water ppm should be deleted from the total but now I'm supposed to leave it in? What if the water is way lower like from filtered and the water is almost zero ppm? I just checked GH's FloraNova Bloom and it states over 1300 are in pure water (zero ppm). I think the water ppm should be deleted from the total, or, I better start using pure water because I don't want the ppm from the water impacting the nuterient ppm.
 
PPM is measured as a whole. If the ppm in the waters very low almost none and you add it to say your res of mixed nutes, it will DILUTE your res mix because you added water that is more PURE and has LESS if any broken down salts etc. to be added to the res water. PPM is a measurement of broken down solids in the water. Without adding more solids and only adding clean water with no salts your diluting the salty water. Sorry for explanation im trying to work in a understandable manner.
 
RemeberMe said:
Wait, now I thought it was completely obvious that the water ppm should be deleted from the total but now I'm supposed to leave it in? What if the water is way lower like from filtered and the water is almost zero ppm? I just checked GH's FloraNova Bloom and it states over 1300 are in pure water (zero ppm). I think the water ppm should be deleted from the total, or, I better start using pure water because I don't want the ppm from the water impacting the nuterient ppm.
Click to expand...

this is how I do it,

I start with R/O water thats about 60ppm, then add my nutes say I wanted to add 1000ppm of nutes, then when done my reading will be 1060ppm never gave me any problem but that might be due to the fact I use R/O water, I dunno.
 
My tap is 250 PPM I add 750 PPM to get me to 1,000 PPM which is MAX that my plant currently will allow me to go. So total PPM's are 1000 PPM
 
Just called GH and they stated to subtract base water ppm from overall ppm to get nute ppm. So some where right, some were wrong, and some didn't get the question.
 
RemeberMe said:
Just called GH and they stated to subtract base water ppm from overall ppm to get nute ppm. So some where right, some were wrong, and some didn't get the question.
Click to expand...


Whats funny is it goes both ways you actually add the base water to get the Whole ppm.or
subtract the base water to get the amount of nutes to add.Same thing stoner confusion LOL.
 
I was always taught if you wanted a PPM of say 500 and your R/O or Tap Water was 50 .. Then add 450 PPM of nutes.. I think GH probably says that to all their customers you will use more nutes which will cause you to buy more nutes! I bet if you told them about the Lucas formula they would tell you how bad it was not to add the Floragrow
 
don't subtract... as stated above. ppm's is a whole and while doing this you stay in range of what your plants will tolerate. happy growing
 
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