Penn Plax Cascade 400 Bio-Sponge
$6.65
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The Replacement Bio-Sponge for the Penn Plax Cascade Internal Filter optimizes colonization of beneficial aerobic bacteria and removes ammonia and nitrites. Quick and easy to replace Convenient, no-fuss replacement sponge Replace monthly for optimum water quality Specifications: Fits Penn-Plax Cascade 400 Internal Filter
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