Originally Posted by Nightshade
Should be a non-issue
Agree also...I've had up to 3 actively fermenting brews into the same blow off at the same time.
Just be sure to have your blow off at the same or lower level than the carboy; also, if you cold crash you would be best served to change the blow off fluid just in case... Those instances are about the only time you'd ever have to worry about fluid being sucked back up. The yeast themselves can't make their way up the blow off tube...
Packaged: Simple Cyser '14 (Nelson Sauvin Dry Hopped!), Spiced Cider, Spur of the Moment Graff
Primary: 15 Minute APA, Simple Cyser '15
Secondary: Why do I keep this line here...?
Bulk Aging: Cocobochet, Wild Cider (2014 & 2015)
Planned: Fruitcake Old Ale, Not Just for Breakfast Stout. Otherwise, so many ideas, not enough time to brew them....