I've got 60lbs of Dekoline [Nevada + Orange mixed] in my 75 and it looks pretty nice. I also really like the contrast it has with my aquarium setting as well, regardless to the fish. My African wood is really distinctive in the tank since I changed to that. I'm in need of finding more red/orange substrate, though, as we get ours through Hawaiian Marine - who has quit importing and carrying Dekoline. I loaded up on it when they were blowing it out on clearance, but there's no way I would ever pay for the stuff at it's regular retail price. I recently got my 300gal tank, and am needing another 120-200lb of red/orange gravel so I can get that covered as well. I'm really interested in hearing who makes the Red Quartz. I know there are some red blends available from 3M (Color Quartz I believe?).