Ron Shimek says a lot of stuff. Not all of it is factual. We tend to believe every word if Doctor is behind a name, but caution should be taken with all advice, and some research and extra opinions should always be taken before applying to your own application. There are too many variables, and most of us are not performing scientific studies under controlled environments ie: labs. I do agree that the sand bed would be too small though, and caulerpa is probably the best choice in this situation, with some water changes. I think a ten gallon is too small for a DSB also, but these are my opinions and not based on facts.