thanks for all the replies.
I got in some nestle pure life water, will also get in some gerber pure to test. I also will test a a few times over the coming weeks to see which remains consistent.
I just ordered some Potassium Bicarbonate:https://www.amazon.com/gp/product/B00BP ... UTF8&psc=1
I want to confirm this is correct:
I will be making my concentrate (by adding 19 grams to 1 gallon water as suggested).
Then adding 15 grams (1 tablespoon) of concentrate to 1 gallon of water, for a 10ppm alkalinity bump.
my first testing of the nestle was (without adding alkalinity):
using API test kit:
GH: 3 drops (instructions says 0-3 drops = 50ppm)
KH: 1-2 drops (instructions says 0-3 drops = 50ppm) (says drops to turn from blue to yellow, but it starts off a faint green after 1 drop, so might be barely over 1 drop, but it does take 2 drops to fully turn yellow)
using hach hardness kit:
3 drops = 3 gpg
based on this I am not sure how much to bump alkalinity. As it could be the alkalinity could be anywhere from 17-34. Would you think to bump alkalinity by 25 ppm?
would alkalinity at 50 ppm and hardness at 50, be any issue in terms of scale accumulation in the brew or steam boiler. Also if the alkalinity was slightly above 50 would this pose an issue for scale or otherwise. Or because the alkalinity i am adding is by way of potassium bicarbonate this wouldnt have any scale impact?
Does having additional alkalinity improve extraction at all. For example if you compared two waters with 50ppm hardness and one had 15 alkalinity and one had 50?