The basic parameters for all Paramesotriton species are clean water, hiding places (flat rocks providing caves are good) and a good amount of space, though each species does differ from the others. They should eat voraciously when they are srttled and happy. Watch out for violence (snapping at each other at feeding time is normal) and particularly persistent bullying. Though they are supposedly stream-dwelling animals, they don't enjoy fast moving water so provide areas sheltered from the filter. I find that they also enjoy a spot just below the water's surface to rest on and wait for food (mine use a large java fern).
They are quite temp tolerant, but keep it below 23C. They are generally very hardy animals.
Chris