I would take it back ASAP. I just bought an ac500 last week and it is perfectly silent (other than water spewing out of it back into the tank)oompalumpa61 said:i just got a ac500 for my 55 gallon that i'm starting up and it does have a little rattle in the impeller. When i take the intake tube out it still rattles. Kinda makes me angry since it's brand new. Think this is just my filter or is it like this for anyone else?
call them first about that. Sometimes they will work with u.oompalumpa61 said:it's kinda of a pain to return it b/c now i have to ship it back to big als so it's gonna cost me also.