The Tape on the Tank: Brew Day Lessons from Pioneer Days IPA
Going into brew day, there was one nagging piece of information I couldn’t shake. I spent hours dialing in the water additions for the reverse osmosis water I was using — linking my water profile to Brewer’s Friend, cross-referencing numbers, trying to get it right. Something still felt off. In developing this CTZ and Cascade West Coast IPA, I did lean on AI to help dial in some of the grain and hop additions, and in all honesty I’m happy with how the recipe came together. Going forward I have a lot more confidence in the recipe building process. The brew day execution, however, is another story.
I knew going in that I didn’t have enough water. A total of 7.6 gallons between the mash and sparge, when it should have been closer to 8.85 gallons. Part of me wonders if seeing a number over 8 gallons triggered a mental block — my kettle is only an 8-gallon kettle, after all. But not all of that water goes in at once, and there are losses at every stage: grain absorption, the mash and lauter, boil-off, and hop absorption. I even went as far as putting a piece of tape on my HLT that read “2.8 gallons — add 108 oz.” I didn’t miss it. I just didn’t follow it. That addition wouldn’t have fixed the problem entirely, but it would have gotten me to 8.45 gallons — just 0.40 gallons short of where I needed to be.
It’s a difficult lesson to learn. At some point, when that feeling becomes too loud to ignore and you know something is wrong, you have to stop and address it before moving forward. The hard part is that the numbers that did come in were actually encouraging. When I drained the kettle into the fermentation bucket I finished with 3.25 gallons at an original gravity of 1.072. The grain conversion was exactly where it should have been — the recipe was sound, the mash process was sound. It was purely the water that cost me.
In my haste I started adding RO water to make up for the shortfall. The instinct was right, the execution wasn’t. What I should have done was calculate exactly how much water I needed to hit my target OG of 1.066. That number was 38 oz — which would have brought me to 3.55 gallons and landed me right on target. Instead I poured in a full gallon before I stopped to do the math. That decision dropped my OG from 1.072 to 1.060, off by 0.006 points, and will cost me a bit on the back end too. I had planned for 7.1% ABV — now I’m looking at closer to 6.3%. Then again, maybe that just makes this West Coast IPA a little more drinkable.
There was one other oddity worth noting. When I added the minerals to the mash water — gypsum, calcium chloride, Epsom salt, and lactic acid, calculated for both the mash and the sparge — my pH tester came back with a reading so low it didn’t make sense. One point something. I shut it off, decided to trust the water calculations I had built in Brewer’s Friend, and moved on. Whether that was the right call, the finished beer will tell me.
Another brew day in the books, and another round of lessons learned. That’s never a bad thing. The brew day calculator even had it spelled out as a checklist item: “This recipe calls for 8.45 gallons (33.8 qt.) of water given the recipe and your kettle profile.” Step checked off. And ignored. It’s a hard lesson — but one that won’t be made again.