I have tried to mix a 13'' wide bar with a black aro the aro just get to stressed to much movement, i know you can mix aros and dats maybe its just black aros that are sensitive, or my 240g gust isn't large enough .So i am going to seat up a dat tank what are some good dimensions to look at for a dat specific tank?My wide bar is in a 55g it looks strange a st full necklace in a 55g i need another tank asap , all the other smaller dats are cool with the aro its just the big boy to bookoo.