And what about water?

For E-6 I use normal tap water as I've read here on APUG that it is better than demineralized water. In E-6 process I only use demineralized water in the stabilizer.

The instructions for the Rollei Digibase kit say that although tap water is acceptable, demineralized water is better. Normally I would blindly follow manufacturer's direction but in this case I am a bit reluctant. Maybe they say that only as a "disclaimer" in case of use of tap water which has certain undesirable characteristics. The case may be that "normal" tap water is still better than demineralized water.

Which water do you use?

Fabrizio