I just want to start by saying that I do not have a tank yet. I've wanted to set one up for years but have never been able to. I just bought a new house, and setting up an octopus tank is finally a serious possibility. I'm just doing some research right now. I would most likely want a bimac. I live in Los Angeles, and see them all of the time when I'm diving, so one would not be a problem for me to get. Anyway, I was thinking it would be cool if I could get everything locally myself. What do you guys think about acquiring sand, food, and other things from my local waters? I imagine that it would be okay since it's from the bimac's natural habitat, but wanted to see what you guys thought.