Hi @Rob1 @CoyoteOldMan
I three months or so ago made up some Magnesium Hydroxide concentrate (1.44 g magnesium hydroxide in 500 ml RO water) with the intent of using it in a water recipe. I never got around to using it, as I have been simply using sodium bicarbonate water.
However I have been following the thread on adding minerals to espresso after brewing, to experiment with taste. So I might use this concentrate in a water recipe, that I would then add to my espresso.
Assuming that there has been no evaporation (which I can then correct) and that the magnesium hydroxide has not settled out, is it safe to use this concentrate? It has been stored in a sealed bottle but I am betting that their is air in the bottle. I would think it is safe and that the resultant water will taste good (not off or stale) but I thought I would ask.
Fyi, based upon @Rob1 s recipe, I will use 15 ml of this concentrate in 2,980 ml of zero water. I will then add 13.7 ml of my sodium bicarbonate concentrate, which is made up of 8g of baking soda per 1000 ml of RO water. I think I got this recipe right?
Just being lazy, as I will otherwise need to use my soda stream to make up a new batch of concentrate.