They tend not to bother with bottom dwellers such as bristlenoses and khulis, well mine don't anyway, but I wouldn't trust them with other types of fish, the key is a well planted tank with mosses and bogwood, dim lighting, floating plants, max 1 per 5 gallons, 1 male to 2 females is a good ratio for a 60l tank, though I had two males to one female as the fish were sent to me so I couldn't choose they were also juvis, the males were constantly scuffling with one another once they reached adult hood and I lost one a month or so ago but they are coming up to two years now.