I have a 55g tank stocked with 4 pearl gouramis, 10 tiger barbs, 2 pairs of German Blue Rams, 8 bloodfin tetras, a common pleco and 6 green Corys. The tank is looking a bit empty, I have a lot of plant cover and structure, temp is at 80, pH of 7. Water is quite soft. Curious what kinds of fish I...