This most basic of all filters requires at least three components: a sponge filter (which sits inside the tank), air pump (which sits outside the tank), and airline tubing to connect them. Now that you’re familiar with what filtration does for an aquarium, let’s talk about the actual equipment you can purchase (in rough order of most to least common). What Are the Most Popular Types of Filters? Once the chemical filtration becomes saturated with impurities, the media is no longer able to absorb pollutants from the waterĮxamples of mechanical, biological, and chemical filter mediaīottom Line: mechanical filtration makes your water clearer, biological filtration makes your water safer, and chemical filtration is something best saved for removing impurities from the water. Chemical filtration uses activated carbon or special resins that can remove medications, tannins, and other impurities from the water.Beneficial bacteria grows on any surface, including the walls and gravel in your aquarium, so many filters come with biomedia or bio-rings with high surface area to provide more places for the bacteria to live. Biological filtration uses beneficial bacteria or aquarium plants that can consume the toxic ammonia and nitrogen compounds that result from your fish’s waste.Mechanical filtration acts as a garbage can that collects trash – which means you as the fish owner are still responsible for cleaning the filter media (in other words, “emptying” the trash can before it overflows). Mechanical filtration uses sponges, filter socks, and filter floss pads that physically strain out debris from the water, much like a coffee filter.Certain filters are better at one type versus another, so here’s a brief overview of each category: The three main types of filtration are mechanical, biological, and chemical filtration. But you and I know the secret to having a beautiful aquarium with crystal clear water… clearly, we just need to find the perfect fish tank filter! Why do Aquariums Need Filtration?Īs one of the key components of an aquarium, filtration is responsible for moving and cleaning the tank water, making it safe for fish to live in. What do most people think when they hear you keep pet fish? They probably conjure up memories of their great aunt’s dirty goldfish tank, covered in mystery slime and reeking of stagnant swamp water.
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