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Under Gravel Filter Accessories
Fits Undertow & Perfect-a-Flow (2/Pkg.)
FC4
Penn-Plax Filt-a-Carb Replacement Activated Carbon Media Cartridges (2 Pack) | Fits Undertow and Perfecto Perfect-A-Flow Filters | Provides Chemical Filtration
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CF1 Cart(2/Pkg)- 2/Pk
QCF1
Penn-Plax QCF1 Replacement Cartridge For Clear Free Filter (2 Pack)
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Fits Undertow "e" Filters (2/Pkg.)
FC2
Penn-Plax Filt-a-Carb Replacement Activated Carbon Media Cartridges (2 Pack) - Fits Multi-Pore and Undergravel “E" Filters - Provides Chemical Filtration (FC2)
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Universal - Fits all UG Filters (2/Pkg.)
FC3
Penn-Plax Filt-a-Carb Replacement Activated Carbon Media Cartridges (2 Pack) - Universal Fit for Most Undergravel Filters - Provides Chemical Filtration (FC3)
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