I'm thinking of starting over because I can't seem to find anything to add to my tank. Currently i have 2 clown knives about 24", a african lung fish 15", 2 featherfin synodontos 5", I had 3 but the gold knife ate one and 1 striped raphael 5". I've thought about adding some central or south american cichlid's or getting rid of the knives and the lung fish for a nearly complete start over to add them. That's why I'm wondering what tankmates everyone have with their knives.