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8.7.5. DIY Bottle Filters
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Make a filter for mini aquarium from a plastic cup & aquarium air pumps - YouTube
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How to make your own aquarium filter with an oxygen blower - YouTube
3 Ways to Make Your Own Underwater Aquarium Filter - wikiHow
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The Tower of Filtration: (Yet Another) Air-Driven Aquarium Filter : 6 Steps - Instructables
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