Homemade c02 usage

Hey guys Im a month into my grow and I've concocted some yeast/sugar c02 .. I'm pretty sure Im doing my measurements properly but it continues to bubble out the top is that normal.... Also is c02 gonna cause damage of it is left in the room during dark periods? And lastly.... It's supposed to smell like the back of a bakery right? Heh hit me up!

Puggyfresh
 
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