heh liveaquaria says their MAX size is 5" and my tank is 30" long. And tank size should be 30 gals and mines 37. That seems good enough. If I wanted a bunch of neons I would have stuck with a 20 gal. What fish do good in a tall tank? Discus? It will probably eventually be a semi-agressive tank because I'm hellbent on getting pufferfish. South-americans seem to be the most peaceful.