Yeah I have 2 rubbermaid brutes filled with saltwater that has been sitting for about 3 days with heat and flow, so thats all ready to go. I'll have to add sand anyways, so I was thinking of using about 3/4 of a pail of my current sand, ditching the rest and adding new. I think that will work just fine.
Can't wait to try out the new Hydor Performer
(thanks zoaelite!)