Aquarium Filter, Fish Tank Filtration & Aquarium Power Filter Supply
They have suction cups that attach to the aquarium glass allowing the water to flow, thus providing filtration.
In these systems, carbon, resins, or other chemicals act as a magnet to pull impurities out of the aquarium's water and into the filtration system. Water changes later eliminate these impurities. Since the chemicals can leach impurities into the water, these systems are not recommended for discus.
Most filtration is artificial, and it partially makes up for the limitations of a closed system; in nature the buildup of waste products is typically prevented by volume dilution of wastes. In the aquarium, regular water changes help close the gap, but filtration is necessary unless there is a high-rate flow-through system, or unless complete daily water changes are performed. Under either of these regimens filtration is not necessary, but otherwise it is—except under conditions of extremely light stocking.
Understanding Aquarium Filtration - Angels Plus
Aquarium filtration is a bit of a mystery to most people
Your aquarium filter helps increase the quality of the water in your fish tank. Most think of mechanical filtration when it comes to aquarium filters but as you will soon see, there are some other fish filter types that you need to know about.Chemical filtration involves removing the dissolved wastes from the aquarium water. Often times this is accomplished through the use of in the aquarium filter. Activated carbon can also help to reduce odors. Many people dislike using carbon in their tanks due to the fact that the carbon is useful for only a short period and then must be replaced. If it doesn't get replaced in a timely manner the very wastes that it removed can be released from the carbon back into the aquarium.Mechanical filtration removes the free floating particles from the aquarium water. The siphoning action of a power filter that hangs on the back of an aquarium does a decent job of this type of filtration.The corner filter sits inside the aquarium in one of the corners or even sticks on to the glass. It is very low-tech but a corner aquarium filter can be used successfully for mechanical, chemical and biological filtration. The key is not to change out the entire filter material when performing . Only change out the carbon and part of the filter material. Corner filters require frequent maintenance and are only used in very small tanks these days if at all.