Hey my FX5 is pretty quiet except the lil humming noises but a couple of days ago after a water change its making all these wierd loud noises as if there' waves hitting the inside of it. usually after water changes it makes a bit of bubble noises but it leave soon after. its been 4 days now and its pretty annoying. the only thing that stops it is when i close the outtake for a bit and reopen it. its quiet for 15-30 mins and then restarts... what can i do?!
thanx
thanx

