Be sure the newest growth is in the center of the pot. As you pour in the fir bark around the roots, firmly tap the sides of the pot and push down with your thumbs on the top to ensure a firm potting. Symptoms are tiny white dots on the undersides of the leaves, giving the overall appearance of being silvery. Control with a miticide, following the recommended dosage. Some growers also have good luck with routine overhead watering to minimize mite infestations.
Scale is number two.
These resemble tiny brown umbrella-like structures on the upper surface of the leaves. If people only have a plant to two, they can use Safer Insecticidal Soap mixed with some alcohol. This needs to be applied to both sides of the leaves and wiped on thoroughly with a sponge. Get the solution deep into all crevices. It is recommended this be done three times a day at ten day intervals.