Hi i have 4 Pseudotropheus elongatus 2 Labidochromis Caeruleus and 4 Metriaclima callainos in a 180l tank, the fish have been in there 4 weeks but the tank was used before that so was fully cycled. The problrm is if i go near the tank the fish all dart off and hide in the oceon rock, if i upped the numbers to 6 of each will they be less shy. Filteration is not a problem as i am running a fluval 205 and a 405.