Danny,
That's the second time in a week someone has called me by someone else's name
No biggie, though
Do you mean you use tapwater or RO when you say "fesh water"? If using tapwater, could have something to do with it, but I can't say for sure.
Hmm.... Don't know if they should be mixed separately then added together. Do you get precip when you mix them together? If not, I would probably mix them together to save time, containers, etc.
I know you can't mix kalk and baking soda together because of precipitation.
BTW, how exactly do you make washing soda from baking soda? I know it involves heating the baking soda in the oven. But how much baking soda do you put in what kind of container in the oven, what temp do you set it at, and for how long do you bake it? I'm thinking of doing that.