Multi-Stage Pond Filters from OASE
September 2, 2016
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OASE (Corona, CA) makes the BioTec 18000 multi-stage mechanical/biological filter for large ponds or ponds with many fish. The mechanical filter captures particles and debris on a 300-micron mesh that cleans itself automatically. The biological filter uses foam loaded with beneficial bacteria to convert ammonia and nitrites to plant-supporting nitrates. For details, click here.