Marina Slim Filter Bio-Carb Replacement Cartridges for Tropical Fish Tanks, Size 3-Pack, showing rectangular disposable cartridges with activated carbon and Ceramitek ceramic biological media, compatible with Marina Slim Filter models S10, S15, and S20, designed to remove pollutants and odors and maintain healthy tropical aquariums.
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Marina Slim Filter Bio‑Carb Replacement Cartridges for Tropical Fish Tanks, Size 3‑Pack

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