Welcome to the Hub, seems you have caught the same Malawi bug I got. No sooner had I decided the poulation for my 1st tank (ok it took a few weeks to get there) that I started setting up another (currently cycling). If only Tony shipped to Italy I would have loved some of his Metriaclima "Dolphin" Manda they look like the Demasoni you like just bigger (a.k.a. giant Demeasoni) but apparently a lot milder tempered, they are also as rare as rocking horse droppings so you may need to do some badgering. Obviously that fills the blue barred slot, but you still have the blue striped, plain bue, yellow, orange, M/cat and OB ones to play with... Suppose you have time to think about the population while you finalize the filters and get them cycled.