So I've been doing some research and reading as always and stumbled upon this new craze. Apparently people have been getting pool filtration sand for their tanks. It's clean sand no chemicals added made for saltwater pools. It's significantly more affordable at only $10-$15 for 50lbs, it's a medium grain sand and it is inert. So far a lot of people have tried it with great success and it's natural sand so it's not white it has a nice natural blend of brown and other colors in it. I think I'm going to give it a try. Any thoughts?