Top Cropping

[Masha]

So I'm considering making my first attempt at top cropping yeast.

I have an APA on US05 which is still sporting an inch or so of krausen on day 8 but its still 10-15 points over my target FG. So I'm wondering if anyone has an idea of how much yeast I can safely skim off without negatively effecting the fermentation.

 

[thylacine]

So I'm considering making my first attempt at top cropping yeast.

I have an APA on US05 which is still sporting an inch or so of krausen on day 8 but its still 10-15 points over my target FG. So I'm wondering if anyone has an idea of how much yeast I can safely skim off without negatively effecting the fermentation.

http://www.wyeastlab.com/com-yeast-harvest.cfm

http://aussiehomebrewer.com/topic/54164-easy-yeast-top-cropping/

http://karlisbeer.blogspot.com.au/2010/03/top-cropping-yeast-from-carboy.html

http://www.aleiens.com/video/top-cropping-yeast-from-a