Hi all, i have an enclosure that is 45x45x45 cm exo terra glass enclosure.. I already keep 1 eastern dwarf in it and im thinking on how many can i fit in it? , the enclosure is well planted, can I buy another 4 to put in it? so the total is 5.? are they 'group' animals because im assuming in the city they all hang around the same water body as their is no point to migrate because its hard to find another water source.. HELP. cheers