Admittedly, it's 1 a cheap $15 set. The other one is pretty quiet. I've had it about a month but it's not even been plugged in a week. I bought it bc I wanted a cheap one to mix saltwater, and possibly for a quarantine tank later on. I'm not super pressed bc I mean, it was $15 & I plan to get another once my tank is done cycling, but I'd like to know if it's just bc it's cheap or bc I need to clean it. How often should we be cleaning these things? I definitely want to get my maintenance right for when I buy a better quality one. Also, I would not like to be electrocuted...Thanks ahead for any feedback.