I’m setting up a 60 g, 48 inch wide tank that’s 16 inches high which will house Congo Cichlid and tetras, and Guinean a.thomasi group. I know in aquascaping l will need to block the line of sight in several places along the 4 foot tank to help keep the cichlids peaceful. But I also want the tetras to enjoy 4 feet of swimming space. I do not know at what level in the water column my fish will swim. I thought a well placed piece of driftwood and some Amazon swords about 10 inches high scattered along the length of the tank might suffice. This would leave around 6 inches of clear swimming space in the upper water column for the tetras to frolic. What do people recommend? Suggestions please.