Filter is the most important equipment in an aquarium and this is what you must know before getting into fish keeping.
There are many different types of filtration systems in the market and for a beginner it can be confusing. There's a hang-on where the filter hangs on the outside of the aquarium, internal where the filter is submerged in the filter and there’s canister where the filter is in a canister sitting below the aquarium connected with 2 hoses. And there are many many more. They all have their advantages over each other. This is because they are made to be used based on different criteria such as design of the aquarium, type of fishes and budget. But they all do the same thing. To house the filter media.