Filters are essential for water cleansing. They remove waste and other particles to keep the water clean. On this site, you will find two types of filters, canister and power filters. Both serve the same purpose, but power filters are more likely to be found in freshwater tanks. Also, power filters are less complicated than canister filters.
Canister filters are mostly for saltwater tanks with plants. One reason for this is that this type of filter is more powerful and handles higher demands. Instead of being inside the aquarium, it is outside and uses hoses that connect to the tank intake and outlet. Canister filters are a 3-stage type of filter media. The 3-stage models would have the biological, mechanical, and chemical filter media. Because of its complexity makeup, cleaning can be a bit challenging for this filter. Nevertheless, washing must be frequent to get the best result. For a bigger tank, expect to get a more expensive canister filter to keep your aquarium clean all the time.
Power filters are more comfortable to operate. As compared with the canister filter, you submerge a power filter in the aquarium instead of having it outside. Inside the power filter is a carbon filter that filters waste or uneaten food. Since the screen is removable, that makes it easier to clean or replace. Power filters are very cheap in comparison to canister filters even with the different size variations. You will see power filters in freshwater aquariums or aquariums without plants than in a saltwater tank.