Greenjoy Aquarium Fish Tank Cleaning Kit Tools Algae Scrapers Set 5 in 1 & Fish Tank Gravel Cleaner - Siphon Vacuum for Water Changing & Sand

The method of trouble shooting: 1. Check the attachment first when receive the item to verify the tightness of vaccum. 2. Put the suction in the tank and try to press the blue ball to check whether there is a whole in the tube-if there is no air fill in when press the ball, then it mean there should be a whole. 3. When using the vaccum and water doesn’t flow continually, then check whether the blue is full of water, please press the ball until it’s filled of water.

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