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  1. Jaap

    No photosynthesis

    Looks like you have melting there. What are the plants? How long have you had these planta in the tank?
  2. Jaap

    No photosynthesis

    Can we see a picture of your aquarium?
  3. Jaap

    No photosynthesis

    How do you know there is no photosynthesis?
  4. Jaap

    pH pens and low KH

    I am between the HM PH-200 and the Milwaukee PH55 http://www.osmotics.co.uk/products/HM-Digital-PH%252d200%3A-Waterproof-pH-Meter.html...
  5. Jaap

    pH pens and low KH

    I m sorry i messed up the threads...both questions were for the seneye?
  6. Jaap

    pH pens and low KH

    Would you use it to measure ph reliably? Would you use it to measure pars?
  7. Jaap

    pH pens and low KH

    What is TDS that the third one measures?
  8. Jaap

    pH pens and low KH

    Can you suggest a reasonably priced good ph pen?
  9. Jaap

    pH pens and low KH

    So how would you go about measuring the CO2 concentration in an aquarium. For example I have a kH of 9 and a pH of 7 and after 1 hour I have a pH of 6.5...what would be approximately my CO2 ppm then?
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