[paphioboy]

edward, dends prefer small pots as they prefer their roots to be a bit crowded. What was the plant originally grown in? If it is one of those dends from Thailand which come potted in a plastic net basket in coconut husk, then your medium may be too wet. Use 100% charcoal for dendrobiums in a 3-4-inch plastic pot. You can cut away any old rotting roots (those which are not white and fat).