Hey Everyone, finally in the process of cleaning out my 150 saltwater tank to house a male hystrix or male mini marble ray, would like to try 2 but not necessary wouldn't want to cram them to much in the 48x24x30 tank. However just curious if the ray should go first or last? As for tank mates Im unsure, would love some kind of top water activity but only think aros due that part but they get so big, and the middle thinking geos, silver dollars or something.