10-22-2007, 02:48 PM
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Yes, fish_4_all, you are correct to suggest arragonite sand for saltwater. This is the best substrate to use. You can typically find it at any LFS that stocks supplies for saltwater, and it is usually found in white and pink varieties. If just getting started, or needing to freshen up an older tank, "live sand" is preferred. Live sand is bagged wet, and will help get your biological cycle started and stabalized. Before using live sand you'll want to make sure the water is in the tank with the salt mixed in for a few days, specific gravity/salinity (SPG) should read 1.023 and temp is up to 76 degrees. Adding live rock after the sand would be the next step, and then patience is the next step.
If you need further help, let us know.