I've been brewing for a while with a Spike 20-gallon system, and trying to dial in water adjustments. Adjusting mash water is a simple process - just make my additions to the known quantity of water I bring into my mash tun before mashing in. I'm struggling with how to use BeerSmith to make adjustments to my sparge water, which I fly sparge directly from the HLT. I've searched the forums but haven't found a discussion that addresses this. I'm presuming that I need to make my additions directly to the water in the HLT, but the BeerSmith calculations are based on the quantity of water to be sparged (vs the greater quantity that needs to be in the HLT for the system to work). Is there a straightforward way in BeerSmith to calculate sparge additions for a quantity of water greater than what I intend to sparge so that the water I do sparge has the correct concentrations? Alternatively, is it correct to presume that I can simply double the amount needed water (in the HLT) and double the amount of additions calculated in the software to get the right concentrations - then draw off only the quantity of water I need for the sparge? Anyone come up with a different solution? Thanks!