Lookin good! Yeah, my ulvaceous came as a bulb too. Don't worry, it sprouts fast. Mine is already too big for my 90g, and it's only been a month, lol!
Yeah, I'm not sure on that substrate either. Definitely not brown. Get some Peace River and join my and Glenn's posse!
Siphon some out, add in some nice fine gravel, pool filter sand etc. and it should look nice and natural.
What's that weird looking plant on the far left in the third pic?
Do you have any green gecko to spare? I could use a few more!