Right, so... Right now, I have my new marble dragon HMPK male betta in my 20gL with my female GBR. Not ideal, but they get along. However, the tank doesn't have a lid and any betta I have put in that tank has jumped out. As I don't want this to happen to Dirk, I did some tank shuffling and he's going into my 10gal. I don't particularly like the 'scape of the 10gal for him, though. Picky, I know, but I love doing tank 'scapes and I don't have an excuse to re-'scape any of my other tanks, so yeah. Anyway, this is the 'scape (basically) of the tank right now: I added some more fake plants in the back, changed out the filter from an HOB to an intank Marina, and added a jaguar skull. The substrate is CaribSea Moonlight sand. Now, because Dirk is named after Dirk Pitt from the Clive Cussler books, I wanted to go with something a little more...nautical. I have a a sunken ship bubbler that I'm going to use, along with a beautiful piece of rainbow rock (if it'll fit in the tank). I'm going to pirate (hehe...pun intended) some jungle val out of my 55gal for plants, and possibly get some anacharis (depends on how it looks). The background is going to be dark blue. What I'm having a problem with is the substrate. I know I don't want to leave it the Moonlight Sand. The white is way too hard to keep clean and I just don't think it'll look good with the rainbow rock and Dirk's coloring (he's a very...interesting marble). I have black Tahitian Moonlight sand and orange sand from Petco (they call the color "sienna": http://www.petco.com/product/115879/Petco-Sienna-Aquarium-Sand.aspx). This is the ship bubbler (best pic I have of it): The rainbow rock is the piece in the middle of this tank: And this is Dirk (best pics I have, sorry!...the parts that look kind of whitish-blue are actually metallic green): So, any thoughts? I was thinking of maybe mixing the black and white sands? What about the orange? Think I could mix it in too?