Hi there, I'm new here and need help. My filter was working when we picked up the tank and now it's not. It's not making a noise or anything. It's a 5 gallon tank
No noise either means no power or the impeler isn't turning. If it has electricity, check the impeller. Sometimes they just need to be taken out and seated back down.
That's my honest answer. Once, my tank light, filters, and air stone all turned off. I realized that the surge strip came out of the socket, so yeah. It could happen.