Aquarium Filters

Written by Leon Huang

Tuesday, 26 July 2005

Article Index 1. Introduction 2. Sponge filters 3. Corner filters 4. Internal canister filters 5. Hang-on-back filters 6. Canister filters 7. Overhead filters 8. Sump filters 9. Conclusion Page 3 of 9 Corner filters Like the sponge filter, this is driven by an air pump. But in place of the sponge is a plastic box that contains the necessary filtration medias. How it works Again, like the sponge filter, the corner filter uses the same air lifting principles. But instead of passing through the sponge, water now passes through the filtration medias that you place inside the filter. "If the filtration medias in it are not heavy enough, the box might move around from the vibration caused by the air pump." Pros The corner filter is also an inexpensive and cost-effective choice. Its advantage, compared to sponge filters, is being able to choose what filtration medias to put in it. This allows you to customize the filter to suit your needs. It is also simple in design, making it great for beginners. Cons Like the sponge filter, it is noisy. And if the filtration medias in it are not heavy enough, the box might move around from the vibration caused by the air pump. Thus it is necessary to weigh it down with some stones or gravels. Also a tiny bit more difficult to clean than the sponge filter, as you have an additional step of opening up the filter. << Prev - Next >>