2 packs of yeast?

[Beak]

Gday, just wondering if we make 46 Ltrs of all grain beer. Do I need to use two packs of yeast or just one.. It's all in one fermentor of course! We have been doing two packs.

 

[seamad]

Pitching rate varies with ale/lager/OG etc
Have a look at this http://www.mrmalty.com/calc/calc.html
With this 46L of 1050 ale needs 24g yeast.
Probably should rehydrate too, but I won't mention that...

 

[manticle]

At least 2, more if high gravity.