Under the right care and conditions, your plant will grow happy and healthy and Clusia are hardy plants. But here are some issues you may encounter while caring for a Clusia: 

Yellow leaves - This is usually a sign that the plant is being overwatered - the most common problem with Clusia. Stop watering and check the soil for signs of root rot and change the soil if necessary.

Mould on the soil - This is a sign that the plant’s soil is not drying quickly enough and the plant may not be getting enough light. Use a chopstick to make ventilation holes int he soil and place the plant in a better ventilated area. 

Dropping leaves - This can happen when the plant is repotted or moved to a new environment. The plant should become stable after a while and grow its leaves back. This is a fast growing plant so it won’t take long.