To start suction on an aquarium vacuum using the mouth method, you'll need to use a siphon. Here's a straightforward breakdown of the process:
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Position the Siphon: Place one end of the siphon hose inside your aquarium.
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Apply Suction: According to the "Mouth Method," apply suction to the other end of the hose using your mouth until the tube fills with water.
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Seal the End: Once the tube is full of water, quickly cover the end you were using to create suction with your thumb to prevent the water from escaping.
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Initiate Flow: Place the thumb-covered end into a bucket positioned lower than the aquarium. Remove your thumb. The siphon should now begin to flow, creating the vacuum effect needed to clean your aquarium.