I bought an Alkatronic and Dosetronic (not set up yet) and have a couple of questions:

  1. How can I tell what generation the devices are? The Alkatronic is quite noisy and I want to know if I have been sold an old version

  2. The Alkatronic is giving me readings of about 7 dkh whereas both my Hanna and Elos alk tests are closer to 6. Also, the devise is retesting on almost every reading (set at 2 hour intervals). I mixed 100 ml of reagent with 400 ml of RO DI water (by weighing them I,e, 100g and 400 g)

  3. Pump A is a lot noisier than the other pumps and is noticeable quitter if I press the outer casings when it runs.