Hello, I have read some of the posts about using live sand and I think that's a great way to start a saltwater aquarium. I am starting up a 75 gallon that will be very basic with live rock, a few fish, some peppermint shrimp etc. No corals, no major lighting requirements. I would like to use live sand...but won't it all get sucked up and away if I use a gravel vac during water changes? I would probably also use some crushed coral to help buffer the water. What do you think?