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To be honest mate im not too sure, I got that info from the AHB website and thought some people on here might find it usefull..

Also - On the botulism thing, not my links but still interesting none the less, 1ppm equals about 1IBU, botulism hates hops. "The present invention relates to the discovery that hop extract is useful as an antibacterial agent against the dangerous pathogens Clostridium botulinum...

I only do 20 litre batches, and most of the cubes are actually 20-25 litres, so I normally have headspace but just before I seal up the no chill cube I force all the excess air out and screw the lid on... Then when fermentation gets active, all the co2 forces the cube back into its normal...

Hey mate, good for you for taking the plunge!! All the lagers I do I ferment in my no chill cubes, simply because I cant fit a full size fermenter in my temp controlled fridge, I dont even fit an airlock, just vent the gas every now and then and when its at full fermentation just crack the lid a...

FWIW, im from NZ, and ive pretty much exclusively BIAB'ed and No chilled since I got into AG brewing, done about 30ish brews so far... The most time ive left wort in a cube was 4.5 weeks, im still alive :rockin: Im not a chemist, im not a scientist, but my beer doesnt give me botulism, and it...