I found my aquarium is not looking so clean lately and maybe since I got a couple more fish in there I may need something bigger to do the work now. I found there was a lot of good information online on fish tank filtration to read and learn about and I think I might buy a book on keeping up my aquarium. I know that this website here I visited has so much useful and good information on what to do and not to do to keep your species in good health and alive. Many more types of filters are available online than in the local store.