I would get a bag of playsand. If you can find the right kind that is.
I have crushed coral in my 38 gallon. Which doesn't have any life in it yet. I plan on getting sand before I get any fish or anything for it. Much easier to maintain and it looks better. Hermits clean it up nicely.
Are you going to add live rock? It would help but if you don't at least you won't have to worry about parasites and such. I just killed a isopod in my tank the other day.
I kept a 38 gallon with 2lbs of LR
, and a biowheel before. That tank did great. But I really like my little 10 gallons setup. It looks much better. I am setting up the 38 gallon with sand and rock when I get some extra money.
38 gal SW
, 40lbs base rock, 5lbs live, emporer 280, bio-wheel 330,tronic heater, 2 O. clowns, 1 firefish.
29 gal FW
, boring...soon to be salt I think.
10 gal SW
, 20lbs LS
, 20lbs base rock, 1 unhappy domino damsel (he was in the 38...switched the percs and the damesel recently).