ppm question

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Boomslang

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Hey guys. I finally got me a electrical multi meter to check my ppm.
I just checked it and I had to turn it to 20K ohms to even read.
Its showing approximately 15000 ohms in my solution. How in the
heck can I get this down. I just flushed and changed my solution
before checking it. My ph is at 6.8 right now. Gonna let it circulate
a couple hours and add ph down to get it in the 5.7 range. My temp
is at 79 degrees. (High I know, but can't seem to get it below that)

Plants look good at the 30 day mark.:) I do however have slight
leaf curling going on with one of them. I only have two plants
right now. I have a 3 5gallon bucket system with a pump that pumps
the nutrients to the back two buckets and 3/4" piping connecting
all three for circulation. Dont have a stinking camera yet.
Any info will be greatly appreciated.
 
Boomslang said:
Hey guys. I finally got me a electrical multi meter to check my ppm.
I just checked it and I had to turn it to 20K ohms to even read.
Its showing approximately 15000 ohms in my solution. How in the
heck can I get this down.

Never heard of anyone doing this but it makes sense that it would.

You would need to use reference solutions and pure R/O water, measure the pure water record the resistance, then the reference solution and calculate the span of resistance to PPM ratio.

The distance between the leads will have to remain constant for any accuracy.

15000 ohms doesnt mean much on its own but in order to get it down you would have to raise the ppm of the nute solution.
 
I have no idea how electrical resistance is translated into ppms....Why did you get a multi meter, rather than a meter specifically designed to measure ppms?

You need to get your pH down to a range of 5.3-6.0.--that needs to be your first priority.
 

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