Which size tank do you guys think would be better for cichla ocellaris, a 78" x 30" x 18" or 78" x 28" x 20". I know I won't be able to house them for life in that realistically but I only have so much room and would like to keep them as long as possible. Also if you think I should scratch those dimensions cus they suck to much or something feel free to say.