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  1. jcspotless

    Measurement of Nitrate with a Spectrophotometer

    Hi, I wondered if anyone here had tried to use some of the homemade spectrophotometers and https://spectralworkbench.org to measure nitrate or indeed other colourmetric assay rather than a test kit. I am thinking about it but its quite a big project so before I start I wondered what I might...
  2. jsiegmund

    Submerged: modular aquarium automation

    Hi all, These last few months I've been working on a pet project which I've called "Submerged". I wanted to introduce it here and maybe some of you might be interested in trying it out or even contributing it. At the moment, submerged supports two kinds of modules: a sensor module for...