I suddenly find myself able to brew tomorrow, so need to get crackin. Making an Old Ale (1.088 OG) base of Maris Otter with some Medium Crystal and Molasses Brown Sugar bringing the color to 18-20 SRM. Below is my current water - what should I adjust?
Magnesium = 0.37
Alkalinity as CaCO3: 18.9
Thanks in advance, all!
EDIT: updated color to a bit darker