Oksygenereing, ja, det står jo på Whitelabs sine sider at 540 trenger mer oksygen enn de andre belgiske gjærtypene, bortsett fra 410. Brukerrapport: "This yeast will attenuate in the 80's but it need LOTS of time. My Belgian ipa stalled at 1.020 (og 1.065) I racked to secondary to bulk age for 6 weeks before adding dry hops, all at once it started to ferment again around week 7. I am now on week nine and it is at 1.011, and tasting amazing. If you use this yeast ... I would forget about it for at least 12 weeks".