I have one of these little guys in my planted 40B. He's a bit shy, but every now and then you see him puff out his chest and boss the cherry barbs around. I'm thinking about getting another one, as so far the one that I have isn't difficult and he is beautiful when he's out and about. My pH is around 6.6, ammo and nitrites are 0, and nitrates are kept 10-20 ppm. The only thing I'd warn is that if you have a community tank, they are pretty shy and you don't see them much. If you want to watch them a lot, I'd keep them with similarly sized fish or in a species tank, and keep it heavily planted with live or fake plants so they feel comfortable hiding if they need to.