i have had this 2.5 gallon mini bowfront tank for a year, kept as a freswater with a female betta, she is moving to a friends tank and the tank has opened to saltwater

this is what i am thinking

get a screw in coralife 10 or 20 watt light bulb 50/50
i have a whisper hob filter rated for up to 10-15 gallon tanks.
and get some sand, and some sand from my 15 gallon
add about 3-5 lbs. of live rock and some zoos
and get a heater(25 watt)

any thing anyone thinks should change or take something away go ahead and say it.