Aquarium Filter

There are two different kinds of filters; there are external filtration systems and internal filters. Internal filters are used in salt water and fresh water aquariums. Many salt water aquariums have an internal tube for the water to flow down into a sump tank, which is just below the main tank and all the water passes through a certain type of foam where all the waste and bad bacteria gather and this filters the water. The water is then pumped back up to the top of the main tank and this flow continues on constantly. Although a noisy method, it is the second most effective but rather pricey. The other way of doing internal filtering is to have what looks like a large black rectangle stuck to the inside of your tank, this sucks up water and waste through its bottom, the water then passes up through the filter. This method is the third most effective method and is very cheap. The external filter is the way to go, this filter is a hard working piece of machinery that keeps your aquarium in tip top condition and gets rid of all the water. It is like the other two methods of internal filtering above but it is al done outside of the tank. The only thing connecting the tank to the filter is a long black tube. This is the most effective and expensive way to filter your tank but it is very worth it. All these types of filters are available at your local fish shop, but not really your local pet shop. For the internal filter that requires a sump tank this is usually custom made to suit your tank so it is expensive but not really worth the money. You are probably better choosing an external filter, although it will cost you more it is more effective and it creates less noise.