Hmm... I was going to spray the tubs and then thought better of it 'cause it says not to spray directly onto enclosure. I might just leave them in their tanks one more day and let that sit overnight. I mean, I am notorious for overthinking everything, I'm sure it's no big deal, but it's freaking me out a little that I can smell it... Sigh. Do you think five or six hours is long enough to let it ventilate?