I have a 60 gallon tank and have naturally very hard water. Ideally I'm looking for a set up where: Mix of beautiful yellow and blue fish (bonus if I can sneak a red in there too). Ideally only 4-6 fish only. Ideally can co-exist with jungle vals (but not a deal breaker if they can't). I only want 4-6 fish because: My schedule will only give me time to do 1-2 water changes a week. The "overstocked" look of most cichlid tanks makes me feel anxious. Is it possible, for example, for me to get 4 malawi cichlids -- one acei, one electric yellow, one aulonocara firefish, one melanochromis estherae, etc. Since they are different color and slightly different shaped, would they still be aggressive against each other?