I have a mix of malawi's and victorian's and I want to mainly keep the vics because they are less aggressive and have different colors. what can mix and what can't mix. The malawis I have are a Nimbochromis fuscotaeniatus, a rusty, a 6" bumble bee not currently aggressive, a flavus currently aggressive, a hybrid of a cobalt and something else, and a yellowfin mbamba. Any help with any of these questions would be highly appreciated.