you can buy dry sand and stop by a couple buddies house and get a cup of live sand to throw across the sand in tank to seed your tank. I would glady give you a cup of live sand to seed your sandbed once its set up and going i got tons of pods, spaghetti worms, bristle worms, and all kinds of weird live crap in my tanks. Thats the best way to do it, by dry cheap sand setup up tank and and a little live sand from everyone elses tank and your all set. I'll like adding dry rock to established tanks to seed for people with new setups for those who can't afford live rock since dry rock is cheaper.