I want to put sand in my new tank, but finding the right sand is driving me crazy. I don't want black or white sand, I want a natural looking sand. I can find Estes sand online, but I hate to pay a shipping charge. I found a caribsea aragonite sand at petsmart that says it cis good for cichlids or marine use, so I assume it can be for any freshwater as well? Would this be a good choice or is there an issue here I don't know about?