When many people think of the word filer, they usually think of a device that strains debris or separates materials from water or air or it blocks materials. This perception is correct. However, it is only one part of a job of a filter. While physical filtration is very easy to see because it involves large objects or large enough objects to be seen with the naked eye, the real heavy lifting of a filter is actually in the invisible realm, in the dissolved toxins.
While visible debris does pose safety risks to your aquarium, these risks and hazards are nothing compared to the threats pose by the things that you cannot see, invisible toxins. Fishes live in the same place where they eliminate their waste. It can be a very unsanitary place without a filter, but even with just purely physical filtration, the danger to your fish is not found in just the physical mass of its waste. The danger is in the chemicals that the waste breaks down to, in particular ammonia and nitrites.
These are invisible and also in early stages of the decaying process, odorless. It is an invisible threat that continues to accumulate and you do not notice until it is too late when your fish has already become stressed and developed stress-related diseases, or their health may have been so compromised that they die. A good filter uses activated carbon to suck out the dissolved toxins in the water. One good filter is the Emperor Power Filters.
These are standard filters that move water from your aquarium through the filtration assembly and filter media then sucks up the toxins that accumulate in the water. What makes the Emperor Power Filter convenient and easy for aquarium owners is that you can easily swap out the filter cartridges. If you have run out of filter cartridges for your Emperor Power Filter, try the Marineland Emperor Rite-Size E Filter Cartridges (4 Pack) from Pet Store. Just pop out the old one, flap in the new one and your aquarium is back in business.
FITS EMPEROR POWER FILTERS 4 PACK