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optimum

  1. jaypeecee

    A New Optimum Dissolved CO2 Concentration?

    Hi Folks, It would appear that JBL have decided on a new optimum CO2 level in users' tanks. Instead of the 30 mg/l figure, which has been 'the norm' for a good many years, JBL seem to be rolling out their latest drop checker (DC) test sets with a new optimum of 20 mg/l. See below...
  2. John P Coates

    Why do we aim for 30 ppm CO2?

    Hi folks, I get the impression that 30ppm is the target CO2 concentration in planted aquaria. If what I say is correct, why is 30 ppm CO2 considered optimum? Looking at the Tropica aquatic plants website, I see that many, if not most, plants are happy with less than 15ppm. That being so, I am...
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