You definitely want to put the end of the tube in a bucket with some water or sanitizer.
If your small diameter tube can't keep up, you might want to put your fermentation bucket in a larger container or bath tub and loosen the lid. Warning, this will make a mess if you krausen overflows BUT it's better to let it overflow in a "controlled' way rather than blow chunks all over your room. I'm not say you WILL have that much krausen but it's better to be ready and have a plan.
Batch 1 Brewing
The American Revolution would never have happened with gun control.