DaisyI said:I would leave it alone for now. You do have some rotting plants on one edge but the other edge seems to be thriving. Let it dry out a bit. Hatiora gaertneri are epiphytic (they live in trees without soil) so pot size is really not an issue. They do best with evenly damp soil - over-watering and under-watering will result in branch loss - they are much fussier than Schlumbergera (marketed as Christmas or Thanksgiving Cactus, depending upon the season).