Bring 7.5 gallons of water to a stable 152ºF (66.5ºC) in your boil kettle. Add 5 gallons 152F water, malt, and 6g calcium chloride to Mash Tun and steep for 30 min or until conversion is complete.
Bring remaining 2.5 gallons of water to 170F (76.5ºC) for sparge water.
Vorlauf, runoff into 2nd kettle, and sparge 2.5 gallons. Collect 6 gallons of wort.
Bring wort to a gentle rolling boil for 60 minutes. Add yeast nutrient and irish moss with 15 min left in boil and 1oz Mosaic hops at the boil’s completion.
Chill wort to about 70ºF (21ºC) and rack into 5 gallon carboy using siphon. Pitch yeast and rock carboy gently back and forth to introduce oxygen.
Ferment at 68ºF (20ºC) for about 7 days until fermentation is complete. Purge secondary carboy with CO2 then carefully rack into second carboy, leaving sediment behind.
Add dry hops slowly to secondary carboy. If foaming occurs wait for it to go down and continue adding dry hops.
After 4 days with dry hops add priming sugar to bottles, rack beer into bottles, and cap.
Let bottles sit at 70F (21ºC) for 1-2 weeks and then enjoy!