I REALLY want to like this aquaclear50 filter on my 30 gal because everyone here seems to but I continue to have issues with it.
I've gotten used to the constant low level rattle - don't like it but have gotten used to it. I've figured out that the reason it won't start after a W/C is that sometimes the impeller gets gunked up. okay fine. I can deal with that.

But ... the filter has this infuriating habit of burping up the entire basked full of media. Sometimes, I get up in the morning and the lid of the filter will have elevated 2 inches above the base. The basket holding the filter foam and bio balls just slides up out of the filter box - like the sponge can't say sunk any more. This happens once or twice a week.

Can anyone tell me why this is happening and how to stop it from happening?

And did I get a lemon of a filter or is this status quo? I want to purchase HOB for an additional filter for my 90 and am not convinced the aquaclear is the way to go.

Thanks and any solution suggestions are appreciated!