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update to Sour Weapon L IBU tolerance
! Lab Name !! Product Name !! Taxonomy !! CO2 Producer (Het/Hom) !! Starter Note !! Fermentation/Other Notes
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| [[Bootleg Biology]] || Sour Weapon L || Lactobacillus plantarum (blended strains) || Facultatively heterofermentative || || Drops the pH of wort quickly. At 98F, trial batches dropped the pH of wort to 3.0 after just 24 hours. When pitched at 84F, pH should reach 3.5 in 24 hours. Ideal to use for acidifying wort for quick/kettle sours, and is also very effective when co-pitched with a yeast strain. As with any Lactobacillus culture, we do not recommend using in worts with <s>10 or more IBUs </s> any hops (this is the up to date recommendation from Jeff Mello of Bootleg Biology; any amount of hops will inhibit ''L. plantarum'' in general) <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2800217156673147/?comment_id=2800400083321521&reply_comment_id=2804474432914086&comment_tracking=%7B%22tn%22%3A%22R%22%7D Jeff Mello. Milk The Funk Facebook thread on the lack of IBU tolerance of ''L. plantarum'' and Sour Weapon L. 07/23/2019.]</ref> as that will prevent significant souring. Isolated from traditional Norwegian Kveik <ref>[http://bootlegbiology.com/2017/06/27/new-culture-pre-sale-july-5-featuring-mtf-mega-blend-sour-weapon-l/ "New Culture Pre-Sale July 5: Featuring MTF Mega Blend & Sour Weapon L!" Bootleg Biology website. 06/27/2017. Retrieved 06/05/2017.]</ref>.
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| [[Brewing Science Institute]] || L. brevis || Lactobacillus brevis || Heterofermentative || || Shipped during log phase, so recommended to use within 2 to 3 days of receiving. Unlike yeast, BSI sells bacteria by volume, and will sell a specific volume for the number of BBL's the brewer is souring. Store at room temperature, not cold. Optimal temperature for fermentation is 102-105°F. Bacteria is half the price of yeast. Commercial pitches only; not listed on their catalog, but is carried in stock. BSI does not have IBU tolerance data, but there has been at least one report of it being tolerant of up to 20 IBU <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2147198278641708/?comment_id=2147921045236098&reply_comment_id=2148812765146926&comment_tracking=%7B%22tn%22%3A%22R%22%7D John Rowley, Andrew Deming, and Dan Ramos. Milk The Funk Facebook group thread on BSI brevis. 06/26/2018.]</ref>.