Water Chemistry for a Mexican lager

[oldsccorpio227]

Hi. I am thinking of brewing Mexican lager and trying to figure out water chemistry. I have the Brewfather app but it doesn't have Mexican Larger as style. I did some digging on the internet and here is what I found

Ca -40
Mg - 10
Na - 35
Cl - 70
SO4 - 10
HCO3 - 25

Does it look right? I am using RO water. TIA

 

[Cheshire Cat]

Looks ok to me I used American Light Lager profile for Modelo clone so pretty close.
Ca 55
Mg 15
Na 50
Cl 75
SO4 25
HCO3 20

 

[oldsccorpio227]

Looks ok to me I used American Light Lager profile for Modelo clone so pretty close.
Ca 55
Mg 15
Na 50
Cl 75
SO4 25
HCO3 20

what is the water ph I need to target? with this addition, I still getting 5.65

 

[Cheshire Cat]

5.4

 

[day_trippr]

Water pH is typically not a target of interest...

Cheers!

 

[BigEd]

what is the water ph I need to target? with this addition, I still getting 5.65

Agree with day_trippr, it's the mash pH not the water's pH you should be targeting.

You're overthinking here. Follow the basic water guidelines for a light lager beer as suggested and brew away. Essentially you want water with low residual alkalinity as the profile supplied by Cheshire Cat is. Typically it would also be low in sulphate with moderate amounts of Calcium and chloride which it does.