How do you care for a money tree?

I have a money tree plant and it's not doing to well it's little branches with leaves keeps falling off and the leaves are starting to look more pale and some brown spots. It has five trunks and one of them is dead and looks rotten but the other ones...

look ok. I water it once a week and dont know exactley how much water to give it but I try not to over water. What should I do about the rotten dead trunk? Could I remove it without disrupting the plant? Any advice?

Hi!

This thread here started by the owner of the site has some great answers from people about caring for money trees:

http://www.funadvice.com/q/how_do_i_take_cafe_of_a_chinese_money

The basics: Tropical plant, very hardy. Only water once a month or water when the soil is completely dry. Uses sandy soil like cactus soil; keep the soil loose. Mist the tree with water in spray bottle once a week.