Helles Lager (default)

mash 45 min to ensure full conversion, then start re-circ to hit 165, then start lauter

90 minute boil for DMS reduction, due to high % of Pilsner malt

1 tbsp fermcap just before boil
18 g whirlfloc 15 min before end of boil
1 g zinc 15 min before end of boil

check gravity in last 10 minutes of boil. If it looks like it is going to come in above 1.050 (1.052 or 12.9 brix on the hydrometer with the 1.04 wort correction factor) add RO water to dilute down to 1.050 or around 12.5 brix on refract). A true starting gravity by hydrometer of 1.048 or 1.046 even would be more desirable than gravity above 1.050.

Add 02 through carb stone at low flow rate (3 L/min) for 120 sec.

pitch full pot of harvested WLP840 American Lager yeast at back of cold box

Ferment at 50 F. when gravity reaches 4 brix set temp control to 70F and let free rise for diacetyl rest. When gravity reaches 3 brix, shut the blow-off. After 3 consecutive days at the same FG reading and passes diacetly test, start slowly crashing 5 deg per day to 40F.

At 40 F, harvest yeast and dump trub, then inject 500 ml biofine and 20 g antiox-C. Set temp to 32F and setup C02 for carbonation. Package when beer is clear and at desired level of conditioning.