I will be starting a new tank in a couple of weeks. This is my first large planted tank venture and I would like some substrate advice please. The new tank is a 65 gal., 36W X 20D X 24H. I am interested in dark (black?) or natural coloration and don't mind layers if that is best. If advice can't be given without knowing the particulars about the rest of the set-up, (filter,etc.), I will have to wait as that information is at home and I won't be there until Wednesday (16 Mar). I have a purchased a canister filter but the manufacturer's names/numbers don't yet trip off my tongue...can't wait till I am that comfortable with all of this. I plan a moderately planted tank and am looking forward to learning about CO2 and ferts. Thanks for whatever help any of you may be able to give!