Originally Posted by TeleTwanger
5 grams? I use 23 grams and that's a barely optimum pitching rate for 5 gallons. I wouldn't worry about over pitching unless you're talking cups of yeast not grams.
A Mr. Beer fermenter is 2.5 gallons or so.
He didn't overpitch, but I'm surprised you use 23 grams in 5 gallons. I've never used more than a 10 gram package of Nottingham, and I don't underpitch. In fact, I just took a glance at Mr. Malty's pitching calculator, and for an 1.048 wort, he says I should pitch .8 of a package (10 gram). I wouldn't pitch .8, I'd pitch the whole thing of course, so I'd be ever so slightly overpitching. With 23 grams, you're overpitching. Unless you're making a big, big beer, there isn't any reason to add over two packages of yeast.