Yeah, if you have a filter or current of some sort in the tank, StressCoat is fine. I actually use it in my divided 10g and because it has a filter there isn't any filmy stuff. It also wouldn't be a problem with jars, or 1/2 gallons, since those need to be changed every 2 or 3 days anyway.

=0) In too deep for me, would be like, 200 Bettas. I'm ok with the 12 adults and 50 or so fry I have right now. I had 100, most of them in seperate tanks with 20 juvie girls in one large grow-out. That was kinda iffy.