I have a question. I am new and don't know a thing but I read a lot and I'm getting a system together a piece at a time. (I'm working a lot of OT). I am to the point where I think I'm going with a dry rock/live rock mixture. I was going to get some dry from Marco Rocks but I see some on e-bay that are cheaper. I don't know if they're any good are not. They come from Texas. The price is good (about 35 bucks for 30 pounds plus shipping) but, I don't want to waste my money. Does anyone have any experience with these rocks?....thanks...John