Too much yeast?

[Christ71]

We brewed about 75 litres of WeizenBock. I used mrmalty and another yeast calculator for my yeast starter.
SG 1069
Step 1: 1 ltr
Step 2: 4.5 ltr

All our fermenters overflowed. Did I use too much yeast?

 

[giraffe]

Probably not. Some strains, with higher gravity worts, tend to explode. It will be fine.

 

[RM-MN]

Mr. Malty is a pessimist. You probably did overpitch but that isn't the only reason for a fermenter to overflow. Temperature of fermentation and the type of malts used can also cause the fermenter to overflow.

 

[flars]

Another reason for fermentor blow off is lack of head space. Some yeasts need much more than others. A Hefeweizen yeast like WY 3068 is one of the yeasts that needs extra head space.

 

[Mer-man]

Not so much a pessimist, as he knows a slight over pitch all the time gives another way to be consistent

Edit: I should add, it's really more of a philosophical leaning on his part.