I have a 20g long with two Julidochromis transcriptus (1.5") who reside mostly around some tufa rock and one Synodontis catfish (3.5") who stays in his cave most of the time. These fish have been together approximately 1 1/2 years now. I'm really interested in finding another cichlid to add to the middle/top half of the tank. Any ideas would be greatly appreciated!