Bring 7.5 gal of water to ~180°F. Add choice sugar, circulate, and bring to a boil. Gently boil for 10 minutes. Check gravity and adjust accordingly until you’ve reading 1.036 Gravity
Turn off heat, add Seltzer nutrient to the kettle, and mix or whirlpool until contents have thoroughly dissolved into solution
Knock out sugar base to the fermenter at desired fermentation temperature while aerating to 8-10 ppm.
Pitch yeast. Ferment to 1.000, 2 weeks at 75F.
Add 4 lb. Strawberry and 1 lb. Key Lime real fruit puree to the fermenter.
Ferment to completion, an addt'l 2-3 days based on temperature.
Cold crash, condition, fine, and package as you wish.