i'm about to start a 5.5 in nearly the same fashion. i picked up some aqua soil of the sns just for this. i'm glad you tried this before me, can't wait to see how it turns out! keep us in the loop, please.
edit - i think homer has the biggest signature on here. it's like half the screen.
how much aqua soil did you get which bag the 3 or 9 liter?