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I have a quick question on water chemistry for my HERMS Setup and a 10 gallon batch of stout I\'m making. I treat all my water (mash:14.6g spare:6gal) at once. Although since I have to make sure the HERMS Coil is submerged I change the Total water volume to 30 gallons and treat All at once. The part I\'m confused about is Sparge water Acidification. I sparge until I get my pre-boil volume in my BK. Do I need to manually go up and change the Sparge volume to what is in the HLT to give me the correct ml\'s of Lactic acid I need? To clarify, the recipe only calls for 6 gallon of sparge water although I\'m having to use 20 gallons in my HLT to keep the HERMS coil submerged during the mash. Please let me know if you need any further information. Here is the link of the water profile:
http://www.brewersfriend.com/mash-chemi ... id=S992TCB
http://www.brewersfriend.com/mash-chemi ... id=S992TCB