[quote=”helene” post=1692]with a very low ph – 4, – 4.5. This is a challenge, untill you learn it 🙂 It certainly was for me. Untill I discovered this ‘Eichen extract’ (german word), which lowers the ph effectively.[/quote]
From me another question concerning lowering of the pH by using “Eichenextrakt” (maybe it’s worth a new thread?): I made the experience that Eichenextrakt (it’s described as an extract from oak leaves) works very fine in lowering the pH – but at the same time increases the conductivity. The producer of the Eichenextrakt I use says that the increase of conductivity doesn’t come from an increase of the water hardness, e.g. from carbonate hardness. So I suppose the conductivity is increased by hydrochloric acid which is contained in the so called Eichenextrakt.
Have you made the same experience, do you ignore the increase of conductivity because it is not caused by carbonate? Or do you use another brand of Eichenextrakt, which doesn’t increase the conductivity at all?