ppm meters

  1. crittertime

    What causes RADICALLY different TDS measurements (ppm) ?

    While measuring TDS of the nutrient mixture and runoff of my 4 plants, I got drastically different results. How can this occur in plants that are on the same feed cycle? Todays watering: in a two gallon watering can, - 1.5 tsp/gal Fox Farm Big Bloom - 1 tsp/gal Fox Farm Tiger Bloom My vivosun...
  2. Hightz

    pH/PPM Monitors: Which one's the best?

    So, today I'd like to ask a few questions regarding brands of nutrient meters and how reliable/accurate they are. I've found a few options I thought could work well based on reviews, but any confirmation on these would be nice. 1. Bluelabs TRUNCOMV2 commercial truncheon nutrient meter...
  3. Calicode

    PPM Meters - RO water

    Can anyone provide a link of a PPM meter that can be used with RO water? Also of anyone can share why regular meters can be used with RO water. Thanks
  4. BlueBerryMango

    Ph pen / ppm pen accuracys?

    well damn!!!! My ph pen dropped into water so I bought a new one....along with a new ppm /EC pen! While making a solution to see how much PPM is in it due to the fact I added alittle CAL/MAG. No calibration pens even though I thought with this new one I'd have to calibrate it. The ppm with...
  5. I

    pH + PPM meters?

    What are you guys using to measure your pH & ppm levels? BlueLab and Hannah are expensive brands but seem to be more reliable/accurate. Things like ATC (automatic temperature compensation) and accuracy are intricacies that worry me about the cheaper products (the $20-$25 pens you can find on...
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