This aquarium vacuum was delivered without an instruction manual. There were tiny diagrams of each step to put it together. The assembly wasn't difficult. I put it in the aquarium and started sucking. Suddenly I was splashed with water pouring out of the hole in the handle! Obviously there is a small damper that needs to be lowered to allow water to circulate in the machine. I did not know it. I also think I'm missing some parts. I don't know how to use it. I will keep trying. I had big problems with the last one too. Maybe these gadgets just aren't working as effectively as I had hoped.
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