Considering closing my Trigon and just running my Rio 180 as a single tank. I'm not sure if I'm going to be pushing the limits on stocking though... At present the Rio has moderate planting, 6 amano shrimp, 3 Oto's, 20 glowlight tetra, and probably 50 red cherry shrimp. Twin JBL e901's are running it. The Trigon has a high plant level (which I'll move into the Rio), along with 6 amano shrimp, 10 red cherry shrimp, 3 botia striata (zebra loach), 4 white cloud mountain minnows, 2 Oto's and 10 cardinal tetra's. Totals therefore would be... 12 amano shrimp 60 RCS 5 Oto's 30 small tetra 4 white cloud mountain minnow 3 botia striata. Moving to one tank would also mean I can stop faffing with maintenance on the Eheim classics which I'm really not a fan of!