My black cap basslet and six-line wrasse have been in a temporary home for the last 3 months while I get their new tank set up. The guy contacted me earlier this week and needs them moved by this weekend. I am just getting ready to start cycling their new tank but need to find them a temp home in the mean time. I am getting a 20g set-up off of someone this weekend to use as a QT and to relocate some of the livestock and equipment from to my nano tank. Do you think I could temporarily house both the basslet (3 1/2 inches) and the six-line (1 1/3 inch) in the 20g, or is this a set up for them to kill each other?