Join Date: Mar 2012
Location: Wilkes Barre, PA
I'm not sure about the height, I've had them in 16 and 18"s and there's no problem. They say it stresses them out, so you may want to consider it.
As for your fish, YES, they will all die or get attacked eventually. Also, you NEVER want to put a catfish of any kind with an ACF, they will eat them and get the barbs in their mouth, stomach, or any other lace you can think of to kill them.. bad idea!