hanging my freshwater to saltwater HELP

[Steve_the_nucks_fan]

Hey everyone so i have a 96.5 gallon tank currently set-up has freshwater but i'm looking to turn it in to a saltwater tank. getting bored of freshwater fish lol.
I'm just wondering if someone can give me some idea to go about setting it up and what else i need to get started?
I currently i have a flu val 404 filter, a 250 watt heater, twp air filters, and to lights.
i'm just wondering what else i need and how much of it i need asap to get the cycles going?
if anyone has any tips that would be great and if you have anything for sale let me know that has well. thanks so much.
you can email me at s_ferriss@hotmail.com

also if you can help with coral, rock, sand and fish selection that would be great also..