plyske wrote:.....
Is this correct?

It looks correct to me.

homeburrero wrote: We recently got a post from sweaner in another thread: Surprised and Troubled by Water...

He simply buys potassium supplement gel capsules that have 800 mg of pure potassium bicarbonate in each capsule.

Wow! That is even simpler than making my ice cubes.

It looks like they at 5 cents per gallon, half price than it was at that time.
https://www.amazon.com/Bicarbonate-Eart ... 07YN71Q9G/

Thanks!

And is this what I need to buy: https://www.laboratoriumdiscounter.nl/e ... hYQAvD_BwE ? (I live in Europe).

Or this: https://www.amazon.de/-/en/Potassium-Bi ... 86&sr=8-10

plyske wrote:1. Ill take a container place it beside my scale.
2. Then I'll measure 10 grams of potassium bicarbonate: add that to the container.
3. Then I'll measure 100 grams of distilled water: add that to the container.
4. Now I've my mix. 110grams in total.
5. Then I'll take 1 gallon of distilled water and add 3.8 grams of my mix to this 1 gallon. Shake and done.
6. Use this for my machine. When my 1 gallon is empty, I'll buy a new one and repeat step 5.

Is this correct?

I think it's fine for this purpose.

P.S.
As Jeff points out it doesn't compute exactly correctly here where you are doing everything by mass (weight) rather than by volume. If you calculate exactly, you have 10 grams of potassium bicarb in 110 grams of concentrate solution, or 0.091 grams (91 milligrams) per gram of liquid. Then if you add 3.8 grams of that liquid to a US gallon (3785 grams) and do the exact math by mass, your final concentration by weight comes out to 3.8 x 91 / (3785 + 3.8 ) = 0.0913 mg/g which appears to be 9% less than the 0.1 g/l we are shooting for. But it doesn't matter that much. For one thing, when you add 10 g of bicarbonate to 100 g of water you do have 110g of solution, but by volume you still have about 100ml of solution. (When you add a salt to pure water the density increases.) The rpavlis target concentration is specified by volume (1 mmol per liter). Most of these coffee water recipes just simplify and assume that a liter of water, with or without salts, weighs 1000 grams. That's pretty much true in general for water reports, where ppm and mg/l are used interchangeably.


And if you are using potassium bicarbonate, I think you OK assuming that 10g will dissolve easily in 100 g of water at room temp. If you were to use sodium bicarb instead it might not dissolve fully.

Thanks so much for your very detailed response, Pat! I'll try it out and return with my TDS readings; hopefully they are OK and I'll be ready to brew with my new water

Love this reply and very detailed. I get my micra soon and want to keep it simple.

Please clarify for me please. Can I just take 1 gallon of distilled and add 0.38g of potassium bicarb to it and use that?? Just making sure as the thread is a little confusing.

aspenextreme03 wrote:Can I just take 1 gallon of distilled and add 0.38g of potassium bicarb to it and use that??

Yes.

Recipe is 0.1 gram of potassium bicarb per liter of water
1 US gallon = 3.8 liters
0.38 g / 3.8 Liter = 0.1 g/L

Thank you. Want to start simple and then potentially branch out.

Moka 1 Cup wrote: Wow! That is even simpler than making my ice cubes.

It looks like they at 5 cents per gallon, half price than it was at that time.
https://www.amazon.com/Bicarbonate-Eart ... 07YN71Q9G/