Dear Oswald, I guess your ...
Published by Edgar Weber, Dipl Wirtschaftsingenieur, Projektmanagement Fachmann (IPMA), Systemic Business Coach
Dear Oswald, I guess your medium is partly desalinated water to avoid scaling. To avoid corrosion (lack of CaCOOH - see Langelier Formular) it has to be conditioned, increase and keep the pH at 8