Today my Aquaclear 50 has been making a random churning like noise every few minutes. Does this mean its gonna die or just need to be cleaned? If so does this noise mean it needs cleaning in a certain area? Water flow seems fine
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I would give the impellor a clean, as it sounds like it grinding which is not good.
I have two Aqua Clear filters. Take the impellar out and clean off the metal part by scrapping it. This metal needs to be cleaned every two to three months. The motor works like a genrator and has a magnetic effect on the impellar, that is what makes it go round.
What do you use as your gravel? I use sand and that is the noise I get when a grain of sand gets in it.