What Is The Best Aquarium Filter: Internal Or External?

We all know that the filter is the most important equipment for any aquarium. The filtration systems are responsible for keeping the water in the aquarium always clean and maintaining a healthy environment for your fish.

There are a numbers of options when it comes to aquarium filters. Therefore, choosing the best aquarium filter is not an easy task and can be a challenge for you.

In order to strip down the choices and help you easier when choosing, this post is going to detail about two main types of aquarium filter: internal and external.

Internal aquarium filter

There are many different options of aquarium out there that can make you overwhelming when choosing them (under gravel filter, sponge filter, power filters, wet/dry filter, canister filters).

However, all the filter products available are divided into two types: Internal and External

Internal filters are designed to place inside the aquarium. They usually include a pump to forces the water into the filter, a canister and the filter media as the sponge.

However, over time, the sponge will get dirt and become clogged. It is less effective and cannot be able to clean the water. It will need to be cleaned periodically and replaced.

Normally, the internal filter will come with two sponges in the package in order to replace it when needed.

The best internal filters will include 3 phases of filtration. The mechanical filtration traps debris, dust, and particulate.

The biological filtration transfers the fish waste and ammonia into less toxic substances for fish. Chemical filtration removes toxic or unwanted chemicals such as chlorine, nitrate, and phosphate.

External Filters

The external filters are designed to placed outside, hang on or underneath an aquarium. The water will draw into the filter by a pump and then go through a combination of mechanical, biological and chemical filter media.

The external filter has much stronger power than the internal filter. Due to that, the external filter will suitable to use for a larger aquarium or in the tank that contains a high density of fish since this tank will include more waste.

The drawback is that it will take you more effort to install and also more expensive than the internal filter.