Correct no need
It’s a very easy mix, make a concentrate. Then dose that to the water
10g potassium bicarbonate to 1litre rodi/distilled water
Then 10g of the concentration to 1litre of rodi/distilled water for the machine.
You can go more, you can go less.
I believe the thinking behind it is that coffee is full of potassium so you don’t notice it, while using different water influences the taste.
I’ve never really know any difference.
I could try using ashbeck for a month to see if I did I suppose.