Well I came home tonight and found a small mess with my Shiraz batch.
I checked on it this morning and didn't listen to that little voice in my head that said "snap down the cover and add ablow-off tube" since I saw it was foaming up. Snapping the lid down and leaving the airlock in could potentially be a big mistake since if the airlock plugs the pressure would blow it out followed by a stream of purple foam or worst case pop the lid off!
I know this happened to jsmahoney with her Amarone Batch and here is the response from Mosti vis George:
I just got this from Matteo Meglioli, technical services at MM. I think now we know why it is important to stir ALL wine kits that have raisins or grape packs!
The 8 gal or 30lt fermenter it should be enough to holding the fermenting kit.<?
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During the first 3-5 days of fermentation is a good practice mix daily the fermenting kit to brake an avoid the recreation of the crust on top of the juice, especially if there are raisins inside. The crust on top creates an effect like a volcano and that’s the result.<O
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What the temperature of the fermenting room and temperature of the juice?<O
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If the temperature is too high could be another reason.<O
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Is the first time somebody report to me something like that, please keep me inform if you have other similar complain, anyway I will start a kit this afternoon to see if it does the same!<O
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Regards,<O
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Matteo Meglioli.
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>Thetemperature in my room is 70 degrees and batchwas stirred twice a day to keep the cap or crust broke. Batch temp tonight was 80 degrees.
I will be ordering a 10 gal fermenter since I see this as the best way to avoid this issue again. I have thought about it when making a Crushendo due to the increased volume and lack of head space.</O
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Edited by: masta