Ruby Elastica Ficus
Requires bright indirect light to keep the pink variegation strong.
Weekly waterings are typically, but in the winter months watering frequency will likely need to decrease to every two weeks to avoid overwatering. When watering, avoid splashing the leaves, as this can cause stains.
Changes in location, light, and temperature may also cause the plant stress and result in leaf drop, so don't be surprised if it loses a couple when you first introduce it to your space.
If your tree is showing brown tips with yellow edging, and dropping from the lower portion of the plant then you are likely over watering. If you see fully yellow leaves, and some crispy brown tips without yellow edging then it is likely due to under watering.