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Biofilter

Any filter that uses beneficia bacteria to convert toxic chemicals in the water (usually ammonia from fish waste) into benign substances. There are many different

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Biofalls

A term sometimes used to describe a pre­ formed rigid liner waterfall unit. Often contains a biological filter ( usually plastic media halls or stones

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Gate stone

Usually located on either side of a wa­terfall and stream to hclp channel water over the spill stone and downward.

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