hello iam completly new to rays and i have found the smallest ray, i wanted to know what the smallest tank ONE could go in for life iam setting up a 4by2by2 soon and would this be ok for life for 1? i might be able to get a 5by2by2 but that is not 100% and is pushing it. any info or comments appreciated. i will not get 1 if not given they go ahead from experts.