Why would you move the Acaras first and then the firemouth? I guess I’m not sure what the difference is in moving them separately or together.I dont think it matters as long as you do it right. Id personally do the dithers then once your tank is cycled move the acara and like a week later the FM. I've never liked the standard orange sword tails but I saw a few at the lfs that were white and red and they looked so cool.