It does best in soft, acidic water conditions. The fish are more outgoing if they are provided with some cover, so try planting the tank quite densely in some areas, whilst leaving some open spaces for swimming. The addition of some floating vegetation to diffuse the light is also a good idea. Other decor can include driftwood and smooth rocks. Water movement should be kept to a minimum. It is sensitive to deteriorating water quality, so efficient filtration and a regular maintenance routine are essential.