I have a 20 long and I don't think my aquaclear 30 is providing enough filtration. I want to add another filter but not sure what I should get. I could get a second hob filter but it's really bulky and obvious and I would like to avoid that if possible. I can't afford to buy a canister filter. What other options are there?
I don't own one but those aquatop filters are on the cheaper side and most people have had good to say about them. Other than that, there are no real cheap options but another hob or sponge filter.
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