Wow, this pump first releases some air, then over time it slows down the airflow and gets louder and louder over time too. Vibration and noise or whatever, another thing is the legs keep dropping down like the pump needs more places to suck in air so it pushes the legs away so it can suck in more air. She just watches you sit and when you look into the aquarium and see your pump which you have higher than your aquarium starts rattling and falls off the shelf again, you get what you pay for
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