I usually start from a loop and use a 10 multiplier, until my last step before pitching, where I go with a 4X multiplier.
Trying to stay in brewing (another story) and wanted to do a sooner session, so got some WL002 that I just noticed by the date gives about 58% viability. I called my LHBS to see if they have any fresher packs, but this is the first time I've used Mr. Malty (per Chris/Jamil's book). I usually go to BrewDad if I'm not using the above multiplier regime. I was blown away by the different requirements they throw out.
Granted, BrewDad is based on a stepped starter and I can't do that on Mr. Malty; and I can't see any fields on Mr. Malty, obviously, to see how it arrives at its recommendation. But for an 11.5 g batch at 1.058 with yeast at 58% viability, Mr. Malty calls for 2 packs, and 10.5 liters. I actually don't know if it requires more, because the slide stops at that point, even if I push it all the way right.
By contrast, Homebrew_dad shows 1 pack at this viability, 2 liters, and then 1.25 liters for the second step, and that's it (even with step 2's crazy high inoculation rate).
The yeast book shows 2 packs at 4 L starter, or 1 pack at 9 L, for the numbers of cells I roughly need. (The table has its presumptions).
Thoughts?
Trying to stay in brewing (another story) and wanted to do a sooner session, so got some WL002 that I just noticed by the date gives about 58% viability. I called my LHBS to see if they have any fresher packs, but this is the first time I've used Mr. Malty (per Chris/Jamil's book). I usually go to BrewDad if I'm not using the above multiplier regime. I was blown away by the different requirements they throw out.
Granted, BrewDad is based on a stepped starter and I can't do that on Mr. Malty; and I can't see any fields on Mr. Malty, obviously, to see how it arrives at its recommendation. But for an 11.5 g batch at 1.058 with yeast at 58% viability, Mr. Malty calls for 2 packs, and 10.5 liters. I actually don't know if it requires more, because the slide stops at that point, even if I push it all the way right.
By contrast, Homebrew_dad shows 1 pack at this viability, 2 liters, and then 1.25 liters for the second step, and that's it (even with step 2's crazy high inoculation rate).
The yeast book shows 2 packs at 4 L starter, or 1 pack at 9 L, for the numbers of cells I roughly need. (The table has its presumptions).
Thoughts?
