Nepenthes is a genus of meat-eating plants in the plant family Nepenthaceae. The plants usually catch insects, but the larger variants can also catch small animals. The cans can be compared to a stomach.
Do not allow Nepenthes to dry out completely. They benefit from moist media and occasional flooding to wash away any accumulated salts. Use relatively clean water such as rain, distilled or purified water. Tap water can be used in many localities if the water is low in salts. Low level chlorine does not seem to be a problem.
Nepenthes generally like bright light without much direct sun. About 50% sun or dappled shade is good. Plant lights often work well if they are broad spectrum and are kept just far enough away to prevent overheating or scorching. Thin, spindly plants or poor coloration are a sign of too weak a light. Sun burn usually appears as red or dead zones on the upper most growth, facing the sun or light.
If you are growing the plant where it cannot catch insects for long periods, you can add an occasional small insect such as a fly, a cockroach or a few very small insects to mature pitchers.