Hello, I had been out of fish keeping for about 10 years, and about 4 months ago i set up a 90 gal tank. The tank has 1 Gold Severum (4.5 inches), 4 Bosemani Rainbows (2inches), 1 Pleco ( I think its a sailfin), 1 red tail shark ( 2 inches) and 1 Frontosa (3 inches). Everyone gets along great...