Not sure if this is in the right section, but I have a 6cm Giant Gourami, a 14cm Senegal Bichir and a 12cm Ompok bimaculatus. Would I be able to mix Geophagus species with them, such as Jurupari, Altifrons, Surinamensis, Heckelii etc. if they were of a similar size? What other fish are good to mix with my current fish?