How much lighting/adding sand bed?

[Dorkel Marine 1]

I want to add a sand bed to my 10 gal. should i put it on top of my present cruched coral substrate. How slow should i go when adding the sand. How much lighting is recomended for a soft coral reef. I have a 55 watt pc. I was told it would be fine. I have read other bulletin boards and they are suggesting i need more. Confused. Also;and i posted on buy/trade; I'm looking for some sand to seed this sand bed. also would like to buy some soft coral frags in the future. Also what is a recommende alk. test kit and calcium test kit. what additives are you guys using for a soft coral reef. enough questions. Thanks in advance. Happy reefin George Muller.