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This booklet discusses the use of live sand as an all-natural, highly efficient form of biological filtration. This more natural approach is written for a broad audience. Thousands of these booklets have been sold worldwide and they continue to be in demand.
This booklet discusses the use of live sand as an all-natural, highly efficient form of biological filtration. This more natural approach is written for a broad audience. Thousands of these booklets have been sold worldwide and they continue to be in demand.