I actually read somewhere or other (not on internet, in a book) that cigarrette smoke can harm fish, particularly guppies. I imagine if guppes are particularly suseptable, then other similar fish would also be, mollies being livebearers also, it could be the problem. Will try to find the reference to it later.
I've nothing to back that up with at the moment though!
I've nothing to back that up with at the moment though!
