Hi, welcome to GoY, do you know the botanical name of your plant?, there are several unrelated plants which have the common name 'umbrella plant', if not could you add a photograph to your question, and we will probably be able to identify it for you, and give you the correct advice, Derek.

Look up Schefflera arboricola Shazmark - if its that, let us know. Also clarify what's wrong with the plant currently please.