AQQA 8 Pack Aquarium Filter Cartridge Replacement Fish Tank Filter Cartridge Aquarium Internal Filter (Small) Woods Equipment a whistling sound will occur

a whistling sound will occur

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Part Number: HC2008

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AQQA 8 Pack Aquarium Filter Cartridge Replacement Fish Tank Filter Cartridge Aquarium Internal Filter (Small) Woods Equipment a whistling sound will occurBrand: AQQA Features: Pack of 8: For optimal performance, we suggest you to change the cartridge at least every 4 weeks. Excellent Filtration Performance: The filter cartridges are made of premium cotton, activated carbon and built in biological grids, which can effectivly remove odors and discoloration, and promote the growth of beneficial bacteria, to maintain a healthy aquatic environment. Easy Installation: AQQA filter cartridges are designed to