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  1. Fertilizing
    Hi guys ! Nice to see you😁 I had some problems and really need ur help. I used EI before but it seems not work for me so I decide to try with PPS Pro. I have some questions 1/I change my water and start dosing. The problem is after change water my tank TDS is immediately higher than tap TDS...
  2. General Aquarium Plants Discussions
    I purchased some RO water from my LFS. I tested the water with my TDS meter and received a reading of 9ppm. Shouldn't the TDS reading of RO water be 0? I don't think this is a meter calibration issue, as I have a Zer000 water pitcher that produces 0ppm TDS water. Using the same meter.
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